I hate to break this to you, but if you've already spent plenty of time IP banning this guy's accounts, deleting them and all his posts, and nothing works to deter him or her, then it's time to move on to another host.

Really, all this extra stress is not worth your time. You're better off starting fresh and moving to another location where this person won't be able to find you.

Use CAPTCHA images during the registration process, require users to activate their emails by clicking a link, permanently ban members when their email addresses bounce back (don't delete them because then they can recreate their accounts), and block email domains if you see they're being used primarily by spammers (@yahoo.com emails, for example).

Listen to Dani - her hard work has paid off at DaniWeb where the spam problem has not gone away (it never will) but has been reduced so dramatically that as far as most members are concerned it has gone away.

A lot of spammers will register and never post just for the free link to their website in their member profiles. You can curb this type of registration spam by only allowing registered members to view member profiles. Spammers will see that it does them no good to have a link to their site in a profile because it won't be able to be spidered by the search engines (so it won't have the SEO effect), and the registered members won't see their profiles b/c, with no posts, they'd have no way of finding them. So doing that will curb registration spam.

In the meantime, delete the website links in their profile if it's an adult site.

Make sure you have enabled the setting to not let more than one member register with the same email address. Then, do not delete the member accounts of spammers because that frees up their email address for them to just re-register it. Instead, permanently ban them.

The only thing I found working is changing the post variables in the register process.

Spammers use bots, that know your forum software. So for instance if you are using the X software they know that they must post to the index.php?action=register page with variables like username, password, passwordAgain, etc.

If you can change those variables, 99% of the bots wont be able to register to your forum.

That is very common problem, I dont know much about forums codes but some forums uses some rules like : Signature links allow after certain number of posts or time, no live links in the message for some time. etc

Steve

you can use 2 step verification for all your google accounts.

Provide extra layer of security to your google account using 2 step verification