https://en.wikipedia.org/wiki/Hashcash https://en.wikipedia.org/wiki/Hashcash proof of work Works great for Teamspeak3. Required 'level' to join server is 22. N

https://en.wikipedia.org/wiki/Hashcash https://en.wikipedia.org/wiki/Hashcash proof of work Works great for Teamspeak3. Required 'level' to join server is 22. New identity takes roughly two seconds of compute time to reach 22. Spammers never bother after first ban.