UO Is already full of douche bags, you should log on to Atl or GL sometime if this isn't a fact for you
There really are very little ways to actually grief players these days also, outside of just killing them in fel if you see them. You cannot rob their houses anymore, you cannot kill their pets permanently anymore, you cannot guard whack blues with arch protection anymore (still possible with RPD suit vs Reds), you cannot outright prevent people from doing anything ingame whatsoever anymore.
Literally the most grief you can cause a person is to outright call them a flaming faggot with autism and hope to god that they have a child or relative with autism that can serve as an actual method to causing them any actual grief or just camp their house (if they live in fel) all day and hope that they live in a large tower so that you can field them out and kill them.