I read this thread fully and all the comments looks like the OP of this thread is breaking the rules of the forum and why admins are giving him chance ever to come back with new ids ?
Why his IP is not yet banned ?
It seems he is buying old accounts and/or using new IP addresses to register. He has been caught via his twitter account.
IP bans are usually a bad idea as well for several reasons.
#1 IPs are not fixed, banning an IP over a lengthy period of time will affect other users with the same ISP but most likely not the person you want.
#2 IPs can be shared massivly, e.g. via Tor, VPNs or large NATs (e.g. for mobile phones). Banning a single IP might exclude several 1000 endusers that access the internet via that IP.