Hi Purpledbear,
Why bother?
1) For the lulz.
2) Because, as Mod noted, SIWOTI and that just bugs me.
3) To learn in an enjoyable fashion.
4) Because I think that creationism is not merely wrong, but part of a harmful system of belief that actively makes its adherents more ignorant and contributes to making the world a crappier place. The internet is a very powerful tool for fringe beliefs like this. The creationist lobby cannot be allowed to go unopposed.
As recent as 40 minutes ago people are still using the same arguments they were using 3-4 years. They trumpet them as if they were new, fresh and creative ideas.
Yes, but for the most part, it's not the same people. People who have been taken in by creationism are not necessarily idiots. Many are perfectly sensible and intelligent, they just happen to have fallen prey to a very powerful self-perpetuating con trick. Such people need to be given the opportunity to see through the lies and the best way to do that is through debate. Sure, most will just give us the brush off, but that's their choice.
Basically, I think that if no-one were to step up and answer creationist questions, the internet would be all the more powerful as a creationist proselytising machine.
Mutate and Survive
"A curious aspect of the theory of evolution is that everybody thinks he understands it." - Jacques Monod