@Epoetker
Ahhhh... Evolutionary psychology. Mostly useless. Its problem directly relates to my comment above. But to put it more plainly it is this:
Premise 1) Most complex human behaviors cannot be encoded in genes, only general dispositions and even in those cases the environment usually overpowers them.
Premise 2) Natural Selection and Sexual Selection (i.e. what you refer to in your first paragraph) only apply to genes that are passed down.
Premise 3) Being a "dick" on the internet is a very specialized, social and complex kind of aggressive behavior.
Premise 4) Behaviors that are not genetic must be learned.
Conclusion 1) It follows by Hypothetical Syllogism from Premise 3 and Premise 1 that being a dick is not a genetic trait, although general aggression may be.
Conclusion 2) It follows by another Hypothetical Syllogism from Conclusion 1 and Premise 2 that being a dick cannot be selected for.
Final Conclusion) It follows once more from Syllogism from Conclusion 2 and Premise 4 that being a dick is a learned behavior.
Since this is a learned behavior it may be true that some people do it to pick up chicks, but this is an accidental property of dickishness. The fact of the matter is that evolutionary psychology at best offers possible explanations for behaviors. However, given that the basis for these behaviors must be genetic, evolutionary psychologists can only prove their theories with the physical brain. Unfortunately there is no supporting fossil record for human brains like there is for, say how whales evolved from ungulates. And unfortunately for evolutionary psychology the more we study neuroscience, the more we find the brain to be almost completely plastic, even for things that would at first seem to be genetic like say LEARNING HOW TO WALK. It turns out that everyone learns how to move differently based upon their natural strength. Some have over-activity in their muscles and learn to inhibit those impulses, others have to learn by volitioning movement. I suggest reading "Being There" by Andy Clarke as he explains how the human brain is primarily plastic and functions in coordination with its environment. This is actually a principle of evolutionary parsimony; why would organisms evolve to internalize processes that they can just as easily rely on the environment to provide. The environment in the case of humans is Society, and it is society that provides us the vast majority of our behaviors.
There are many different ways to be a dick. I can pretty much guarantee you that Bernie Madoff was not a Bully in high school. Each person learns to be a dick for different reasons, bullies may do it out of some insecurity they get from their home environment, or they may do it to get lunch money, or to establish dominance and keep others from messing with them, and Wall Street swindlers do it to get money. Indeed very different psychological types may underly the same behavior, so we should probably be suspicious of any sort of generalizing.
One final thing I might add is that you seem to be committing the descriptive/prescriptive fallacy. I may be wrong but your comment as a whole seems to argue that "online competition is, in fact, real life competition" in some sort of quasi social darwinist stance. While I am, for reasons I shall not elaborate here, not unsympathetic to social darwinism (sans the hard genetic determinism that early social darwinism assumed {social darwinism died out somewhat unsurprisingly after WWII due to its role in Nazism, and thus never had the chance to adapt to findings in neuroscience), it is a mistake to think that simply because natural selection occurs that it should be our guiding ethical principle. Even if all these behaviors ARE due to natural selection, (as I believe I have sufficiently proved that they, in fact, do not) it by no means follows that we should therefore endorse them. I would amend you stance by stating that it is by SOCIAL SELECTION that these behaviors occur. After all, the idea of natural selection really stems from the laws of thermodynamics, i.e. in any open system (closed systems burn off energy until they reach equilibrium, our source of perpetual energy is the sun) where there are limited resources, different self replicating forms will appear, the forms that use the same resources will compete, and the fittest form will be selected. This applies not only to nutrients in the environment but to the minds of individuals within society. Competing beliefs or value systems either drive each other to extinction or specialize by dividing individuals in a society into separate subgroups (equivalent to competing species developing different niches). And they are selected for based upon several different factors that may sometimes compete; i.e. psychological gratification (like belief in an afterlife or heavenly reward), or due to technological benefits (like the physicalism/naturalism that the scientific method assumes in its inquiry that holds that everything must have a cause that is in principle observable, which in turn emboldens curiosity). The question we must ask, then, is what selective processes cause dickery, and whether these processes have a benefit, or are necessary for the functioning of society. And even if they don't we may still abstain from trying to eliminate them as it may simply be a violation of free will. See; "Clockwork Orange".
But I will agree with you on one point. Dismissing dickish behavior on the basis that it is always an act of overcompensating by pathetic individuals seems to imply that the "truly strong" people are the passive polite ones. This is, itself, a laughably pathetic and mistaken view. A great man once said that Honor is having the power to abuse those weaker than you but instead showing restraint. This is because you do not GAIN power by using it on those weaker than you, the only benefit is to FEEL powerful, which is something that is done by someone who IS overcompensating. However, this also implies that the powerless are incapable of honor, which they are. Powerlessness is NOT something to be idealized. Cursed are the meek. And, as I already quoted in my comment above, "I often laugh at those who think themselves good because their claws are blunt." Those who were indoctrinated to be politically correct are no better people than Germans who were indoctrinated to be Anti-Semites by the Nazis. Indoctrination is indoctrination. Ethical judgment depends upon agency, and agency depends upon choice.