Comment by thatguy0900

The identity provider doesn't need to tell the forum that you are 50 different people. They could have a system where if the forum bans you the forum would know it's the same person they banned on reapplication. As far as people making a real person account then using that to do Ai stuff yeah there will have to be a way to persistently ban someone through anonymous verification, but thats possible. Both the identity verifier and forum will be incentivized to play nice with each other. If a identity provider is allowing one person to make 50 spam accounts the forum can stop accepting verification from that provider.