this would probably fall into the same vein as the "Server Names" question - "bad subjective" because there's no real way to decide what's the "best" prank ever pulled - it would wind up being a list-of-things rather than something of constructive use (though I suppose you could argue that coming up with a creative new way to scare the pants off your employees has some constructive merit it would be a little hard to say it's "professional" :-)
Of course nothing stops you from hopping into chat to talk about pranks - you've got 10 days left to plan!
