If an alien race wanted to wipe us out the LAST thing they'd do is send in war ships and troops. If they have the technology to traverse the universe then bombing us from some insane distance away or engineering a virus to wipe us out would be simplicity. It would also be far faster, easier, and more cost efficient. There's only one movie I've seen that came close to this and that's Maximum Overdrive. Yeah, the Steven King movie where machines become sentient and start killing all the humans. They were made sentient by an alien ship in orbit around the earth that everyone thought was a comet. No one on earth EVER knows they are being invaded.Torkuda said:Pretty much any movie that bring up aliens for the express purpose of the "aliens are gods" trope. Yes, they traveled light years to get here, it's still stupid to assume that means they can blow up buildings with their minds and completely dominate us. Yes, we HAVE seen advanced cultures fight un-advanced cultures and ya know what, the gods (the advanced culture) 100% of the time, bleed. Advanced cultures generally win, but they still bleed. If they didn't, explain the wars of the natives and settlers, or the Americans with Iraq, or the Romans and... well a good number of their enemies. It's rare that victory, in a war, means no one on the winning side died.
(I especially love the arguments in favor of this. "But what if America were to fight Republican Rome? They only had swords and knives and stuff!". Yes, because it's not like knives and stuff are used to kill people to this day, and it's not like the Romans could just do what the natives did and take guns from our corpses or trade with our enemies for them or anything.)
That's all assuming they'd be interested in us at all or if the technology to traverse the universe is even possible. One scientist, I don't recall whom, once said "If they're out there... Where are they?" As old as the universe is, dozens of intelligent races would have risen up billions of years before us and, even with our current level of technology, could have used conventional rockets to form an intergalactic empire spanning the galaxy by now. Which leads one to believe there is three possibilities. We're protected, like some sort of animal preserve. Interplanetary travel is just too expensive of an undertaking. Races invariably destroy themselves. Or that they're all melded with some super computer living out eternity as Neo and don't give a damn about the real world.