In my VAST experience in pvp with my 4x shaman (2 AB's) I haven't had any problems.

The first one was a good solid 20 minute battle for nodes, I held the mill alone, 5 levels below the alliance players, without any problem. The few times they made a concerted push I was able to fend them off and they quickly decided it wasn't worth their trouble to try and snag it. I also was welcomed by the other players, I'm not sure they realized what was going on at first but in short order they were cheering about how much ass we were kicking...

The second was a pretty absurd 5 cap. I had leveled to 59 at this point and we took 4 right off the bat, the 5th was an easy push and then we kept them pinned down in their graveyard... again, no one badmouthed me... Hopefully this trend continues, I enjoyed the BG's and really look forward to 70 for that reason.