Highly unlikely that I pissed somebody off to that point. I go to a fairly preppy school where people are a little less than mechanically inclined, and most drive new BMWs, Audis, etc. that mommy and daddy bought for them. I doubt anyone that I may have pissed off would have the knowledge to pull the drain plug.
If the timing belt and Idlers were gone wouldn't the car not even turn over and move at all? Just a thought.