P.S. It doesn't actually give you headshots.
It's one shot kill with a text edit.

[However, who am I to say it exists? I have only heard of it.
A way to tell if someone IS using that method is to check
their stats at the end of the game.
Count the approximate number of HSs they got in the game and see if the
stats match. If not, then you got hackiiied against. HAXORz!]