I'm not going to insult your intelligence and say that I only attack other 85s or that I only engage in 1 on 1 combat. I attack anyone who I think I can kill, no matter where we are or who's with me. My guild raiding BoT and you're by the meeting stone? 10 of us will rip you apart in a second. Level 30 in STV? Dead. etc etc etc...
Hell, I even have a character Horde side made specifically for stalking certain lowbies who had the nerve to make an Alliance character to trash talk me. When any of those people are online, I will stop what I'm doing, no matter what and camp them until they spirit rez and hearth.
Now you may be wondering, "Gsus, why are you doing this? is it because your parents beat you/ you were bullied in high school/ you are a virgin etc?"
No. It's actually a lot simpler than all that:
This is my world. I go where I please. I can be anywhere at any moment for any or no reason whatsoever. I don't have to justify being there- it's my world. As the owner of this world, I can make whatever rules that I want. Being the gracious master I am, I have one single rule:
No members of the Horde are allowed in my world.
It's really that simple. If I see any members of the Horde in my world, I will promptly kill and camp them until they leave. I don't care if you want to be here- this is my world, mine is the only opinion that matters.
Horde, this is your fair warning. Get out of my world and stay out. I don't care if you want to level, gather, do archeology or whatever it is that you living piles of filth do. Do it somewhere else.
And don't say I didn't warn you.