Well I'm not a heavy rper and I am not experienced at it so my answer is going to be a little unqualified. However, based on what I have seen, most rpers who would do something like that are either A. On the same level just opposite side of the players that role rp servers simply to grief, B. Simple elitist who feel rp is the "right" way to play, or C, which is the most likely in my opinion, are just passionate about the world they create for them selves and just want to protect it, and being a minority among gamers they can get over defensive, but they mean well for their community.