You know, the idea of aliens invading us has always struck me as a bit unlikely.
For one, if a civilization is so advanced that they can travel the incredible distances between stars, their technology would be so far beyond ours that what use would we be to them?
It seems logical that the more advanced a civilization is, the more likely it is to be benevolent; this is a bit of an assumption, but they survived themselves, didn’t they? And it is also likely their own technology serves all their physical needs quite well, also.
So why invade Earth?
And of course, if I am wrong in my assumption that they are benevelont, any defense would be hopeless. If they can travel that far, and have a reason to attack us, we would be as defenseless as snowmen against flame-throwers.
It is possible, though, that they are merely sick of watching our TV re-runs getting broadcast to God-Knows-Where, and they came here merely to blow up all TV and radio transmitters. I hope not, because my wife and I love watching Jeopardy during dinner every night, it is a part of our daily routine. But then again, the thought of Howard Stern finally being silenced pleases me.
Dan who loves his Tivo machine