[matkoniecz]

They don't. That is just one of problems of NFTs.

(if they do - they do it outside blockchain, what makes blockchain part quite pointless, beyond Ponzi part)

[superbaconman]

All encryption schemes have this problem. You never really know who you're communicating with unless you trade keys irl.

[matkoniecz]

Many are good enough for their purposes (https in general), NFT is not good enough for its stated purposes.