I used to do that, too. Although back in TBC I'd occasionally go watch non-capped hordies do their Hellfire dailies, swoop in, mind control them three times to HoT/Buff/Bubble them then run off into the sunset just to fuck with them.

Faction is pretty much meaningless now, especially since more people play both sides, and all I really wish for is people to gtfo out of Outlands when I'm playing my alts.