Very true. I was part of a huge RP guild on Great Lakes. We had our own town complete with Castle and a church. There were times when we had RP PvP events and other times when knuckleheads came to cause some mischief and we chased them off, but however when I was on my Thief, i always got ran off.
As I said before I can see the reasons for both sides, but if they do not make a RP server, and when the list of servers go up I am sure the Rpers will nominate an 'Unofficial' RP server and will most likely flock together for the Guild Keeps and so forth for protection and gaming experience.