Hmm most proper mmos that have PVE and PVP in which PVE servers for dueling can not be taken place inside a city, only outside, in faction based games like wow, the opposing faction can enter but then they have to fight off the whole city which is fun to watch.

I approve of duelling, no one is asking for duels inside of a city or sanctuary, its great fun. If people do not want to see it, then just stay inside the cities like you already are? Also this game defo has the most over sensitive players, probably why the GMs have started to switch off a lot in game more now and only respond to actual reports like ninja looting.