[santosh]

Down here we call it both. Here sometimes friends will do it as pranks on each other, but usually people do it because they don't like some one.

When I lived in Alabama a while ago, I heard from some friends that becuase it was becoming such a large problem in our area, if you were caught, they would fine you $1 per sheet of toilet paper. It was probably a little myth.
To get it down, I have heard of people getting a hose and wetting it so it falls to the ground and then raking it up. I have also heard of people lighting it on fire and having a hose incase it started lighting the tree on fire.

I saw something about forking on that MTV show "High School Stories" where some kids got a few thousand forks and forked their school.