Detection!!
As of today (November 2, 2019),
Acitivison/ Infinity Ward has updated their anti-cheat, and thus a huge ban wave has occurred. As of today the anti-cheat detects all ahk mouse_move events. This includes all methods of hiding ahk scripts such as spoofed/masked compiled scripts, junk coded/code-masked scripts. It also detects if used from USB, separate encrypted partition, and even when "run as different user". All methods of bypassing detection through common process list spoofing do not work as the anti-cheat detects the simulated mouse movements.
Please do not use any AHK scripts until bypass is made, or unless you are using the only solid way to stop AHK detection which is running the game in VM and using the script on host pc outside the VM. If you are one of the few people who can use VM to run game this doesn't pertain to you. Keep on using at your leisure :P.