They programmed it that way, whether accidentally or not, and it being that way made it a legitimate strategy. Pushing him off took down all of his health, killing him, just like anyone else did by playing "regularly." They called it an "exploit" because they have to from a programming standpoint, but you can't be punished for coming up with a strategy.

Losers that can't push him off or angry that they can't pass it"quit being such a sore loser n just play little man