Hi,
if that's the case, somebody will probably get in trouble without being guilty, poor guy.
One the other hand, chances are pretty low that this is the case.
A good firewall and virus protection will do most of the work against some tard who scans randomly for some IPs and I don't care about them, if I'm attacked by the same guy often, over a couple of days it's another thing, and I always send a mail to the ISP from where the attack comes from...in all cases the attacks stopped 2-3 days later, and never happened again.