Quote Originally Posted by AuT03x3C View Post
I know that VAC is not active in the main menu in MW3 but they could add an anti cheat for the main menu(very unlikely) and then the hack could be detected.

VAC doesn't care about reports: https://support.steampowered.com/kb_...1010-TOKN-8461
They need an update to activate it in the Main menu.
So for this Version of MW3 it's undetectable