I think one minor thing they can do for improvement is have a pop up when you join an RP realm stating that you are on an RP realm and will be held to the RP realm rules in public chat channels such as Say, Yell, General, etc. Then have a button you can press to view the rules.
Though I’m not saying the bigger improvements you guys suggest aren’t needed. Mostly just offering a quick suggestion to maybe help curb the harassment while they work on a more permanent solution.
I don’t know when I’m on an RP realm when I join a group, and I’ve even been stranded in RP realms before after leaving a group. So another fix would be to make sure any non RP realm people are sent off the realm when they leave a group.