yes, I was talking to someone who claimed that nostr can be censored by ICANN because nostr relays "must" (according to him) have an ICANN-registered domain name, and when a device tries to look up the corresponding IP address, ICANN may simply refuse to say what it is. I told him that relays don't need a domain name, they work fine with a raw ip address, so he asked me to prove it, which is why I did so.

And it really is a cool feature of nostr, imo. It would be neat to see a client designed with the assumption that relays are just random ip addresses, shared with followers via nprofile strings, such that the only time a user interacts with them directly is if they are replacing one that goes down.