100 Points = Overwatch?

Hi, I got a game ban this morning from being overwatched, which shouldn't have been possible as I've been playing in a 5 man team of people I trust so I wouldn't get reported 11 times to trigger the OW. I had a game last night where I got over 100 points, and my friend said to be careful because over 100 points means you get insta Overwatched. Is this the case? I can't think of any other reason as to why I'd have been game banned otherwise, unless one of my good friends decided to troll me which I highly doubt.

Yes, if you get 100 points, your game will be sent to Overwatch

100 points does not necessarily mean you automatically get sent to OW.
Anyone who says it is/is not really can't prove what they're saying because usually cheaters will have 100+ if they're rage cheating, but good players can also have 100+ especially if it's a game with bots on either side.

Either someone report botted you (no one can prove that report bots work / don't), one of your friends troll-reported you, or vacnet got you.