Please stop. Remove that stick from your rear end and just have some fun for once.
I'm getting really sick and tired of people getting upset over what happens during warmup even though it doesn't affect their stats at all. Everyone should know by now that warmup is basically a mess where people goof around for a few seconds. It's rarely an indicator of how the match is actually going to go. People usually quit screwing around and start taking the game seriously once warmup is over and the match begins proper.
Except there always has to be that guy who has to get butt hurt and vengeful over some playful trolling. Had a round where the first thing this player did was empty his M249 into me as soon as the round started because I killed him a few times with the shotgun during warmup (Which again doesn't matter because those deaths don't count against him and I stopped the TKing shenanigans as soon as the match started proper). FFS, people, have a sense of humor. Stop taking everything so personally all the time...
In fact, just get rid of pre-game warmup. With the number of times matches have devolved into childish bickering and back-and-forth team killing just because of some crap that happened during warmup that doesn't f*cking matter, it's just not worth it. I don't know what's happened to this community. It's nothing but trolls and people rage quitting now.