How does the ban Hammer work???

Simply put, what does the Banner Hammer do? How does it work? I have seen people who are clearly pulling off Network Manipulation and yet they are Never Banned. How do I know you ask? Because as severe as it is, I would never see their gamer tag ever again.

All I’m asking is…What does the Banner Hammer look for? Does it look at Game stats? Footage from the game? What?

I know you can be banned for Being AFK in a game, yeah don’t do that. What about playing the game improperly such as in GB you only go for kills or you hold on scoring because your team-mates are killing? Or you flat out refuse to score due to this.

Lastly, I tried to find a post about this and Nothing. I found “why I got banned” that’s on the First Page. Found several Locked Topics, but nothing that states the answer to my question.