the community owner must configure some challenge exchange between his node and the users publishing to his node. the challenge is completely arbitrary, it can be a whitelist, a password, a super complex interactive game, sending a picture of your passport, account age, minimum karma, a combination of all these things, etc. Since it is arbitrary, it will evolve with time. Any method (already invented or invented in the future) that centralized platforms use to filter AI spam can also be used, but over P2P.
the community owner must configure some challenge exchange between his node and the users publishing to his node. the challenge is completely arbitrary, it can be a whitelist, a password, a super complex interactive game, sending a picture of your passport, account age, minimum karma, a combination of all these things, etc. Since it is arbitrary, it will evolve with time. Any method (already invented or invented in the future) that centralized platforms use to filter AI spam can also be used, but over P2P.