i got one in a ffa legitly check my online vault 

iFCW

Most of them are gained by luck. Many many times i've been 2-3 kills off and had some guy i just killed spawn right behind me. Theres nothing that you can do when it happens. By the time the guy hits the ground he is already up and shooting you from behind. This is the prime reason i stopped going for them. I've still come close to them without even trying but something random always happens and i die. I have also yet to be in a match where someone else has called in one.

Yep

Not had one yet. Not really that close either lol but I'm only posting in here cos I've been killed by 3 maybe more but 3 I can remember and all 3 were by boosters and one of them was just a couple of hours ago, I reported them but not 100% if anything will happen to them, and funny thing is on the replay they try twice because the guy on the opposite team gets killed ao they move places half way through the game and just carry on hahahaha cheating bar stewards need banning lol