Re: Hacking back against forged attacks
"Bob announces that he will hack back against anybody who attacks him."
heh, I wouldn't announce it, just do it.
That's where the liability comes in - if you don't cover your ass and get the right target, you're as bad as the perp [and so YOU get in trouble]. Unless it becomes a ginormous free-for-all, in which case, popcorn please.