A registered user came one night and posted pix of gay guys at an orgy, followed by a very long and very graphic list of sexual activities.

I deleted the post of course and banned him, but he still comes around to try to post the same ad again. He's getting a "no permission" message everytime, but that doesn't seem to make him stop.

I threatened to report him to his ISP, but I realized that he uses a different address whenever he logs in. He's probably using a proxy server. Is there anything I can do?

Persistence is the key here - keep on banning until he gets the message. He'll eventually get the message.

Also try one of them hacks that won't let a post go through if it contains certain words [it looks like it posted to the user but it actually goes into your mod queue]. That way it isn't sat on your forum while you're not online.

__________________
Host your forum with a reliable, stable host from just $2 per month!
Are you running a bigger forum, or a network of sites? Get a VPS from just $6 per month!

I was wondering about that hack. What if he first writes a clean post that goes past moderation, and then goes back to it and edit it with porn spam?

ban his Ips, I dont mind if there is a human being doing this...because you have to work for your sites/forums.

the only thing i care about is they are using bots to post the msgs.

__________________
play free online game , free game cheat codes , World lyrics collection , cooking recipes collection

Keep banning him. He'll give up eventually.

If it becomes too much work on you, then you might need to increase your staff number. If your forums ever get to the point where there is too much spam or too much to take care of and you yourself cannot handle it in a timely manner, then you probably need more staff.

Does this guy have consistent email addresses? If it is the same domain and it is an uncommon domain (not gmail, yahoo, bellsouth, msn, etc.), then you could also just block all registrations from that email/domain.

__________________
...some super-sweet signature

If you're willing to do abit of research, you can find out the proxies he's using, and then contact them about it. Chances are one of the proxies will give you information about his real IP.

__________________
▐▌ The Late Night Club ▐▌
When Boredom Strikes Late at Night!

Thanks. How do I find out about his proxies?

For now I have combined all the e-mail addresses I found on this thread: List of SPAM email addresses? and blocked registrations on all of them.
260 in total! It did the trick.

If you can fish through the proxies, find an legitimate IP, simply fire off an e-mail to abuse@nameofprovider.com.

ISP's keep track of multiple IP usage so if you can find the IP, they can trace it to them. Chances are, he'll just get a slap on the wrist because most ISP's really doing look into theses cases unless threats are involved as there's no true harm done.

Personally, keep banning or contact him nicely and ask him to please stop abusing your services. If that doesn't work, continue to try.

__________________
» Effectively Using Forum Signatures
» Tips for Choosing a Reliable Web Host
» 7 Traffic Generating Tips for Communities