The Alliance are less organized on our server (by an order of magnitude), but they have a great love for camping your corpse. It gets rather annoying, since 85% of the Contested Territories are Alliance-controlled.
The only ones that seem to have a high Horde presence is Stonetalon and I haven't seen terribly many Alliance in Arathi. Oh, and Thousand Needles seems to be good too.
Forget Hillsbrad, it's a gankfest that hardly ever ends. Ashenvale is supposed to be like that in reverse, but it's not. Alliance gank squads were rampant when I was levelling in Ashenvale.
I haven't quite gotten around to the next tier of Contested Territories yet, so we'll have to see what they're like.