"Not Kicking Hackers"

I was in a game, were we had one Hacker using one shot kill hack. He had all the Hacks.
He was killing about, 5 to 7 players each round. We all asked if they would kick him,
but no. They let him play until the last round, and then they put in the kick vote. (12 to 4)
But guess what, the vote did not work. He was not kicked, first time I saw that one.
My point, if you have a Hacker. Kick his ass! We don't need them in the Game.

Why in the world would you even keep a Hacker in the game.