Welcome to Gaia! ::

Get on to one of your best buddies accounts. Store all the clothing, mounts, and the Hearth stone of thier main in the bank (if there isnt enough room switch them with alot of useless items). Then swim thier bums to the middle of nowhere. If I may suggest: The creepy house just on the other side of the mountains from Dun Morgh.

This happened to my guild leader. His wife had the day off from work and was on her rogue, getting ready for the raid. She got extremely bored at one point and noticed it was almost time for her husband (the guild leader) to come back. Well at this point we had 3 people just recently get hacked in the guild and left naked in Tanaris With only a hearthstone and their bags. You can kind of guess what she did x.x;;.
About an hour later on vent you hear the guild leader come on, lag in and freak out. Very hard not to try and laugh when trying to calm him down. Also freaked out alot of the guild who weren't on a while later.

Another which was kind of a self prank by accident >.>;;. Well one of our pallies in his sig on our forums has the auto update thing from the armory. Well our pally's like to strip outside the area we were raiding at and have nothing but thier cloaks, helms (most of teh time the rocket helm) and maybe Cookies Tenderizer on and just dance and blast off into the air. Well one of the pallies forgot that they did that and while looking at the guild forums and saw his sig completely freaked out at work XD. Later after checking his armory and seeing what he had on did he remember.

Those have been the most recent in the guild that I can think of.

Not so much a 'prank' but an April's Fools stunt my guild did this year.

Our GM promoted me to guild master saying that he wasn't up for the task anymore. It was believable because at the time he had been under a lot of stress.

It was only myself, the GM, and maybe a couple officers who were aware of the nature of the stint. In any case, under my new command the GM title was changed to Yaoi Goddess and the other ranks adjusted to various things as well. I think I had a Bishi Lover rank to put my favorite people in (against their will). I also designed a new tabard for the guild . . . what was it? Bright pink with a white leaf border and a lavendar kitty face, IIRC.

That was a great day. XD

Ok so my friend had a 60 nightelf rogue.. (before exansion) and one day he pissed me off, rly bad i cant remember y. But i played the horde (cuz im kewl like that) and so i got on to his account (carfully) and found a 60 nightelf rogue and a 53 gnome rogue... this made me happy. I stripped his chars all weps armor and hearth, then i put his 60 rogue in the bottom o undercity (took me awhile to do stealth-sprint-vanish runs through the 60 elites) and i put him as close as i could to the boss of uc, then for his 53 i put him in the battle arena in org... u know the one in the back? yea so he logged on the 53 first (i was on vent with him) he goes. O s**t wheres me gear, wait where am i? Is that an orc gaurd? O GOD RUN!!! and about the same for the other rogue sept he kinda saw it commin he died alot, then finally gave up and spirit rezed lol good times...

No, The greatest is destroying their hearthstone completely but never say anything. Then they usually wait until the end of an instance to decide to use it. So funny. Doesn't work with shamans though....Grrr......

Pft. I wouldn't get freaked out if my hearthstone was missing.
I'd use the stuck feature more then once, auto hearths you.

Well i know of two. First one a mage can do, follow a friend around, when hes trying to gather herbs or something, soon as he stops for an herb throw a portal right on top of the herb as he goes to right click it so instaed of getting the herb he'll port himself to a city.
The second one I did before they change d the animation of ritual of souls, I yelled come get your healthstones here, but dropped a doom guard portal. it killed me, and killed all them.