Dare I say that part of the problem might stem from the fact that there isnt really much else besides PD Raiding, Bank Raiding and Base Raiding for the majority of the playerbase. There is a lack of systems in place that people can experiment and have fun with that distract them from doing things like this, so its hard to blame people from doing the only thing they really can do. There is always the argument of "just passive RP", but at this point its such a small subset of the playerbase that actually enjoy doing those things.
The issue isnt particularly a problem with PD as in general I'd say the PD is in a particularly good spot (maybe I'm biased because I'm active within it). The experienced players who have everything they want will always PvP because it is the only fun thing they can do and they will always find ways around the rules, policies or features that you put in place. The people who don't have anything will PvP because currently it is the only viable way to get the things they want. I feel that the only way to combat this is to make a more feature rich environment that actually adds more viable ways for a player to play the server and achieve the things that they want to achieve.