Some good pranks?

One word:

Sharpietheirfaces

Dont do anything with longterm effects like shaving eyebrows or cutting hair. If they get their nails done, use nail polish remover and wipe it off haha, or take pics of them looking tarded. Then make the pic look like green smoke coming from the breath- post them on myspace! Nothing like a pic with a pad stuck to their face either.

Nair in the shampoo bottle should do the trick.

set up the hair washing with a little honey in the hair routine

Put saran wrap over the toilets,then put the seat back down. I've done this in college a couple of times......hilarious