Srsly.
What did bugs do to you? What did they ever do to you? They're annoying, yeah, but should you really kill them just for that? Or is it because you're bigger than them and are able to kill them, that's a perfectly good reason to squash bugs?
And don't pull that "Oh, bugs carry diseases!" I won't argue against that, but seriously. The odds of you contracting a disease from a bug is low. Very, very, VERY low.
A lot of you probably hate bugs. But just because you hate something doesn't give you the right to kill them. I mean, if everyone killed all that they hate, where would we be? I mean, eventually, no matter how good you are, one person, just ONE PERSON will probably hate you. And if the rule above applies, then guess what: You're dead.
I'm not saying you have to like them. I'm just saying that you should think about what you're doing before you crush a bug.