Wow this is fun, big can of worms stirred up here. I can't help but wonder though, that while i respect your decision (even if i think your reasoning is weak), it sounds to me like you're more concerned with animal welfare than the fact someone on your plate used to be furry and cute. Which there is nothing wrong with at all, in fact it's to be commended in my opinion. But if this is the case, why not just buy from sources where the animals are treated correctly? Jumping straight to vegetarianism seems like jumping with both feet first where, walking would do.
I personally only buy Free range chicken and eggs, which i know have been given the best life possible in captivity (which honestly probably is more pleasant than in the wild...do chickens even exist in the wild anymore?). Cow i only buy British beef, which is generally from a farm, and cows just sit around in a field in the wild, so i fail to see how a fence and someone to make sure they don't get sick bothers them. Fish i'll be honest I've never bothered much about as i'm not a big fish eater, and while i probably SHOULD check the sources, i don't buy it often enough that it affects me (probably less than once a month).
Not that i'm trying to change your decision, as if you're happy with it i wish you the best of luck, just giving my two cents.
On the topic of Carnivores, Herbivores and Omnivores, does it really matter that people call themselves vegetarianism? I mean, you say that people need to make up a word to point out they're not following nature, does this apply to homosexuals? What about political parties, should we involve those also? I think it's more of a social thing than a nature thing.
Also being a Carnivore i'm pretty certain is impossible due to insufficient carbohydrates and the amount of Protein, iron and fat in red meat would kill you. However i could be mistaken about that, as animals do manage it, and i'm not biology savvy enough to know whether nutritionally it's possible for humans.
As with the pills argument, it's better to avoid pills if possible, as vitamins and iron and other such nutrients aren't stored like fat, thus if you take a concentrated dose you only actually get what you can absorb in the time it passes through your system, which is maybe 20%? That is why pills give over your RDA, whereas meat and other food give it a lot slower as well as usually containing things that help you absorb nutrients.