Afaik, Primal’s client doesn’t and it only reads from their own relay (by default, but defaults matter). That’s how they can censor people for “good reasons“ like impersonation.

Yeah, I’ve wondered whether clients actually do that validation. I mean, it’s probably expensive to process, right? It’d be nice if there were tools to check if there are any fake events of ours showing up on the relays.

0xbitcoiner

It’s also important that your nostr client actually verifies the signatures and doesn’t trust the relay to do it, even if it takes a few seconds to verify the signatures of all incoming events.