Why do they have a "false start" in the Olympics?

Question

Just saw it in one of the track races.

Answer 1

So no one starts too early and gains an unfair advantage.  

Answer 2

There's always been "false starts" in track. It is supposed to be when a runner starts early accidentally, however, sometimes they are a part of the strategy.

Answer 3

So that nobody gets a unfair headstart.

Answer 4

it is when a racer starts too early

Answer 5

So the tracksters wouldn't have a jump start (which is an advantage) over the others. It's a fair way for the tracksters to get out the blocks evenly.

Answer 6

they enjoy faking out spectators