For a laugh me and about 10 mates used to burgle another mate who was living with his mum at the time. It was little things at first, a garden gnome here, a doorbell there. Over the course of a couple of weeks it got to the point where we hired a transit van and cleared out his entire garden (front and back) and the contents of his conservatory, which he kept unlocked, including a weights bench, 2 x PC's, a desk, a stereo and CD collection. We would then send ransom notes and even a video of a gnome getting thrown into Pompey harbour, just to let him know we meant business lol.
Sure enough karma came around and as we invaded one night he had staked out the garden with his entire family, cue one of the most impressive fights I have ever seen. My personal highlight was his mum knocking out one of my mates. He saw the funny side after a couple of months and we returned all the goods. My mum made me go around and apologise (i was 21) but it was fun while it lasted.
I should have added that this was the culmination of about 3 years of childish practical jokes.
Who needs enemies eh?
Sounds a lot like what we all do in my group of friends now, that one is bloody hilarious id love 2 do that with my mates!
Heres one that might make you laugh! Just read this after writing it, and it is quite long, the end is good though so worth a read
When in Magaluf last year, we had about 4 rooms, and a couple of low key pranks were played, leaving **** in a bday(sp?), putting pubes in peoples wallets ect.
After a few nights though, the pranks reached new levels, keys were being stolen and people would return for a half hour in the night, go into other peoples rooms and throw all the beds around, pour water everywhere, put shaving foam on the mirrors, and mix up all the clothes.
When it came to our room, we were the last to be pranked upon, and we lost a key ( at about 3pm ) so we were pretty positive our mates had it. A friend from another room told us who had it, and we set out a cunning plan to get back at them. Firstly let us tell you that they were very cunning and managed to do over our room and then plant the key on our balcony, and have the door locked, so it looked like we might of just left the key behind! (They'd simply jumped a load of balconies to do this

)
Our cunning plan? Because we knew of the prank they were planning to play, we emptied our safe contents into a friends, including PSPs, wallets, jewerly, ipods, phones ect prior to the prank they were going to play.
When we had been pranked we acted cool at first, laughing it off and going along, and then we accused them of stealing our stuff from the safe, and asked for it back, naturaly they were worried as they knew they hadn't taken from the safe, but we pestered them and then eventualy we acted mental saying "someone must of left the door open", "how could you be so stupid" - they felt so bad! Wasn't till the next morning when we came out Phones and Ipods a'blazing that we told them.. haha!