Yes, we can have a spider which is attackable by everyone, aggroes guards but is invincible. Pretty neat if you want to annoy people in Orgrimmar. Explosive Trap and Flamestrike kills it though. I made a short video about this. Probably it will get fixed soon, but have fun while it lasts.
Pulling these spiders to OG is annoying to others as hell, as guards are flooding the chat with their random speech, also players are usually shooting it from every direction. Great fun :)
Also, do you guys remember when we could have a flame patch as a pet? Too bad that they hotfixed that :/ Video below the link.