I dont htink this is really an explioint, but i dunno where to put it.
so basically, on a PVE server, u have to turn ur pve on for ppl to be able to attack you. what you do to kill shammans hu nter or warlocks or oppostie faction is (this is basically just trickin hteminto attacking you so they turn their pvp on):
1) challenge them to a duel
2) once they accept, turn your pvp on
3) THey'll attack you, but because you'r ein a duel, their pbvp wont be turned on.
4) Once they duel is over, if they are a shaman, their totems will shoot you, this will cuasr their pvp to turn on. A hunter, if their pet is defensive, it should attack you becasue you were attacking in duel, same with warlocks.
5) then you're free to kill them.
this guidew i kind of useless, but its great fun killing nubs.