Knowing human nature would tell you this is possibly a bad idea on a game of this scale.
But I'm sure there are examples if this idea being a liability in other games, and just have to look around to see.
Statistically, most of the people would likely not abuse it. But even if a small percentage does, it will wreck things. And with a game like this, a 'small percentage' can still be a large number of people.

