I agree with Serena....
The actual number of PvP'rs is far lower, probably even as low as 10% of the player base.
You always see the same people over and over in PvP with the occasional kill or random engagement from a passerby going to a mission or just there to watch.
I'd like to see them setup a dedicated Dimension for PvP instead of the lame setup we have now. Maybe take a lesson from Asheron's Call with their PvP only server.
They also have a nice way for the occasional PvP on the carebears with a quest to turn Red and you can only engage other people who are Red thereby leaving those that DO NOT want to PvP in peace...
Just my two credits...