We did that when I was a senior. Took the tires off, left it on blocks with the keys and tires locked inside.
Also welded the teacher's parking lot gate closed with some heavy gauge wire (easy for a set of bolt cutters to cut the wire and allow the gates to open). Stuck over 100,000 forks into the football field in the shape of our year. Cling-wrapped the entire covered breezeway areas with a big roll of that clear pallet wrap so people were forced through a maze to get to the buildings. Moved all the desks out of 4 classrooms and turned the rooms into huge Rub Goldberg contraptions that eventually ended with a big banner dropping announcing the seniors our year were the best, etc etc.
The Rub Goldbergs actually were re-assembled at the request of the principle in the gym as something to show visiting school board officials the next week. Guess they had to prove we were learning something
