OMG, we do some crazy crazy pranks on eachother on our campus.
Each organization has a position called "warlord" which is basically the head person for all the pranks and whatnot.
Here are a few of the things we've done in the past to TKE.
Put our letters on their house and took pictures and then placed them on flyers all around campus.
Painted the tke front door with our colors and our crest.
Unhinged the tke front door and videotaped one of the tkes opening it and then freaking out because he didn't think he opened it that hard!
We've forked their yard, saran wrapped their cars and bungeed their front and side door together so they couldn't get out of thehouse (only for a few minutes though, a huge fire hazard).
We've done other things to many other orgs but we usually do the really good stuff with tke