That is a problem in several communities. They are still a rather new concept and some are handling it better than others. Most of the communities have discord chat rooms available, I don't know how often they get used, and another way to support the community owners is when they make a ruling about a post not fitting the subject matter of the community, support their decision and avoid the *well you should make an exception for them they are new and didn't know".

I know @midlet caught a lot of flack for some actions and post he made for his On Chain Art community. People want community rules but they don't seem to think they apply to themselves. Now you can go to On Chain Art and see post that fit in the community and not a lot of spam, because he took care to get his community off the ground right from the start.

There are a few communities that are well managed, and if there is a particular one you are interested in, but it is a mess, ask to be a mod, and try to clean it up.