[rdb3]

Even if it's a yahoo or hotmail type email account, which logs IP's, they are most definitely using some sort of anonymous surfing IP mask.

That wouldn't be a problem if this site made open-proxy IPs forbidden.

[wolficatZ]

"That wouldn't be a problem if this site made open-proxy IPs forbidden"

That really seems to be the only solution.

I belong to several nonpolitical forums that will only accept emails from real ISPs in order to register and post, harassment like this current situation is never a problem.