Okay, I had to share what just happened when I tried this in Horde territory.
Character - level 8 Forsaken Warlock. I was bored hanging around in Brill, and there was a chicken running around. I was curious, so I made a chicken macro and started spamming it at the bird.
After maybe 40-50 repetitions, I got the message "Chicken looks up at you quizzically. Maybe you should inspect it?" (I'm actually copying this verbatim from my screen.)
I got excited and turned towards the chicken to discover that it did NOT have the question mark over its head, nor did my cursor change to the gear when I hovered over it. The cursor remained a sword.
Instead, the guard over at the town boundary RAN OVER AND KILLED THE CHICKEN!
That has to have been the single funniest thing I've seen while playing this game. Apparently, activating the quest script got the chicken flagged as an Alliance chicken. Ha ha ha!