True story: An MIT student spent an entire summer going to the Harvard football
field every day wearing a black and white striped shirt, walking up and down the
field for ten or fifteen minutes throwing birdseed all over the field, blowing a
whistle and then walking off the field.  At the end of the summer, it came time
for the first Harvard home football game, the referee walked onto the field and
blew the whistle, and the game had to be delayed for a half hour to wait for the
birds to get off of the field.  The guy wrote his thesis on this, and graduated.