I was in WSG the other day and I found a nice place to hide with the flag. I'd say It's an exploit, but since I'm showing a funny thing I found with a hunters pet as well, I placed it here.
I've only tried this on the alliance side, but It should work for the horde as well. When you first enter WSG, behind you there are two pillars next to the flag.
The invisible wall looks like this.
If you have walljumped before, hitting the sweet spot won't be a problem.
I start by jumping up, getting stuck around here.
Work your way up by pressing "Forward + Jump"
You'll finally end up here.
I think you can get a little bit further up, then you can start walking around a bit. I have tried, but I never managed to get on top of the platform.
------
Now for the hunter pet, It's probably been seen before, I just saw it while doing ZA.
If you look closely, you'll see it looks like a face =p.
Looks a bit like joker.