I'd try this first...
Quote Originally Posted by 40oz
the next time they poke at you just tell them, " so are we gonna fuck or what cause if not leave me the hell alone."

There are 2 outcomes to this:
1 they will fuck you
2 they will be disgusted and leave you alone
If that doesn't work ask them:
"Ever heard of Columbine?"
That should take care of it.