I agree about the being filmed part, obviously that is ridiculous. As highly scrutinized as Cam was coming out of college, I don't think he was ever as high profile as Johnny Manziel currently is though, and certainly Luke was not. Johnny is just going to have to adjust.
Johnny brought that all on himself though. If he wasn't out acting like a jackass, the media wouldn't be following him around. He's "high profile" BECAUSE of how he has acted in the past, the media is hoping, nay, expecting him to do it again. They'll be there to run the story and get website hits/tv viewers etc.
Now Im not harping on the guy, he's just out having what he considers fun, I don't fault him for that, but when the kid comes out and whines about the media pressure he's under, well he's only got himself to blame. If he was boring, just went to class, went to practice then went to a bar/party WITHOUT being thrown out, he wouldn't have a fraction of the media buzz around him.
And im not talking about pressure to perform on the field, thats a separate thing. The cameras are on the dude because they want to be there when he does something "news worthy" like being tossed out of a strip club or something, which going by his previous history, is highly likely.