RANDOM ONLINE ETHICS QUESTION [or not]

What are the ethics of publishing suspected IP addresses of people trying to hack into your computer? I've got this one fellow who has tried eighteen different ports over the past few days, and I'd like to put his or her address out there so at least google will pick it up for those who are also subject to hacks from that address. Is it a bad idea? Forget it. That was dumb.

MORE: As brmic noted in a friendly e-mail, if it's "that easy to notice," then someone probably just doesn't know what they're doing. Kind of like me.