I think most of you already know this..
How to prevent getting booted from the game by sore noobs who thinks booting hackers would make them proer.
When you suspect someone is booting you.. leave the game. After around 30 sec, go back in and punish them.
One way to confirm if someone is booting you is to try and boot a random person. If they are trying to boot you, the game will tell you a vote is already in progress.. It really does'nt help with keeping your kd but at least you can spoil their game.