Here there are two things about Orgrimmar that nearly no one knows:
1) There is a spot in The Drag where you can become totally invisible. Just go here:
http://img393.imageshack.us/img393/1...8153333yw3.jpg
Then move around a little until you find the right spot (you need to be very precise, sometimes you need 1-2 minutes to find it):
http://img292.imageshack.us/img292/4...8153431nb6.jpg
2) If you target an Ogrimmar Grunt and do /kiss, he will do /flex for you. As far I know, there are no other guards that do that.
Both working on retail servers.