Eh, I don't personally care.
But it could lead to nastiness as lemmy expands. If enough people go to the trouble of looking it up, you get some of them being assholes because people are prone to being assholes. That leads to drama. Drama leads to nastiness and worse things sometimes.
If that's going to be part of how lemmy works, so be it, I'm way too old to skip using a block list for assholes. But it might bite federated services in the ass, so it probably should be on the list to get implemented.