I'm not saying Nostr is, I'm saying Derek's relay is and wasn't shared originally as being a censorship relay. Who knows, what else him and who he works with will censor next / deny their ID's....
Discussion
I think every client and relay should be joined keeping in mind the reality that you can be blacklisted in mind. Just be a good human and there shouldn’t be anything to worry about. If there is something to worry about, use another service that’s more reputable for not blacklisting. The free market will weed out bad acting relay and NIP05 operators, but I don’t believe Derek is a bad actor in any sense of the word.