How do you know they told him not to go out? According to Johnny, he said he wouldn't embarrass the team. He didn't get in trouble, he didn't do anything wrong. So he didn't embarrass them.
This is a non-story without TMZ telling you it should be a story, and people going "omg they're right, he went out, he's supposed to never leave the house" . If TMZ wrote an article with a picture of Johnny Manziel smiling in his family's living room with the headline "Johnny up to his old antics, when will he ever learn? This time he's drinking wine at Thanksgiving with his family" you'd be saying the same thing.
The Browns didn't demote him because he "did" anything wrong. They demoted him because the media has successfully convinced idiots like you that he did something wrong and it's an opportunity for them to look like smart disciplinarians while also further distancing themselves from a QB the coach never wanted. This is the fukking definition of a media invented story. And y'all dumbasses are the ones letting it happen. But let it be one of your favorite players and we'll see what the reaction is