I knew with mbam, there is website attempting to change steam, steamservice, iw5mp, t6mp exe on my computer and so all steam files.
I knew with mw3, when joining a dom game, there is 18 players and no objectives.
So I know there is fake servers and players on bo2.
A solution is, after close steam, to delete all dll and exe in steam folder and all files and all folders but let the common folder where there is game files to doesn't have to download it again because it's too long. Then I repair steam with the steam installer, taking 30 minutes or less to update, and I repair my games with the button verify game integrity.
If someone have another good solution, he's please to let it in the comment. Thanks...
PS: The goal is to concentrate fake players between them, because we don't have dedicated servers but we have fake servers.