Presently when you are below 1500 you are vilified and everyone attacks you. It is not only bad for PvP, it is also totally against common sense - housewifes and kids and their hamsters attacking a vile cold-blooded killer? oh come on! They should run when they see you!
My suggestion is either to add one more reputation rank "feared" at -10000 reputation, making guards shoot you and everyone else in town run from you, ot just doint that for the vilified reputation rank. What do you think?