You don't have to pay much, but he could just sign up with a new proxy address each time. Whatever his game is it doesn't look like banning him is going to stop him anytime soon, but hopefully hell get bored eventually.
He'd have a hard time finding any proxies that aren't evil.Yes maybe he will, but I think mods should ban and remove all his FUD threads each time. That should expedite the situation. From what I can tell most of his FUD threads are still there.
AFAIK, it's using specific IP addresses to prevent users. Blocking an IP range, especially in a residential sense, wouldn't be helpful imho, too much room for error, maybe blocking IP ranges of datacentres.
It doesn't block anything. It adds evil "points" to the IP and a smaller amount of evil "points" to every IP in the same range. The more evil your IP has when creating an account the more BTC you have to pay to sign up. Known proxies and Tor already have the max amount of evil too.
Not really. As I write this, I am on a free proxy - one of the thousands available for anyone.
Sometimes I switch IPs/countries between posts if the thread takes too long to load.
Spammers obviously have more practice at evading detection, so I have no doubt that Sol Adoni has a significantly larger pool of proxies to operate from.