maybe the fix for spam in these chat groups is to have relays that only accept events for specific groups, like for example a wss://nostr.freenode.net, and then you can have the "bitcoin" group inside the freenode relay and everybody agrees to only use freenode, which has a light registration policy for people to talk in its groups

and if people got mad at freenode because of anything, they could easily switch the group to wss://nostr.liberachat.org by just replaying the messages to there and posting new messages there

some people could keep living on freenode if they wanted to, but eventually all the freenode haters would stop reading from freenode, so the freenode users would be isolated there -- which is fine