I can imagine the struggle @midlet went through cleaning. I used to be active almost two years ago when this blockchain didn't need to exist yet. The art tag was just a means to get more visibility with content that isn't remotely related to art.
I like OnChainArt the way it is now but I still think there are a lot of features that need to be improved such as incentives to post at the right communities for content related rather than methods that come off as punishment. I'm currently just being semi-active on the chain as real life priorities occupy a lot of my time. So far Hive has turned out to be way better than the other blockchain overall.
I think it will take a little time for people to adjust. At least with communities you can only post in one at a time unless that community allows for cross-posting. When some front ends went to allowing 10 tags, that kind of opened the floodgates to tag abuse and a devil may care attitude.
Perhaps after hivemind is fully up and running the community owners can get a system worked out that if their community tag is in the first 5 it is rejected. I have seen many communities trying to make the first five tags subject tags, and then you can call on the tribes and curation trails with the last five.