This is a simple trick that i fell victim to the other day (yes I was the noob in the situation ). There was a bunch of horde in the deep run tram IF side, messing around and one of them dropped an engineering target dummy. I thought I would be a dick and ran up and wrecked the target dummy. Turns out that although it is a created object, it does count as a pet and flagged me into pvp. To make a long story short they nearly chased me all the way down to the stormwind side of the tram.
So find a noob that you want to kill, drop a target dummy and hope they attack it. It’s that simple. Probably would work even better if you dropped one in a noob zone then stealthed by it, but obviously that’s not required cause there are people like me out there who will attack it anyways – let the noob grieving begin!