Public location... what expectation of privacy do they really have?

Not that I think that is in any way cool to do that. Those kids are douchebags. They aren't worth your time.

I EXPECT that shitheads won’t take pictures of me, even in public I’m allowed my privacy.

If you are on public property, like on the street, fair game. A restaurant has to give permission or the person would for recording for public purpose. Husband was a videographer. You learn where and where you can’t be with a camera quick. Watch Live PD. The cameras have to get permission to follow the cops into open businesses and people’s homes. Once in a business, they do not have to get permission to record anyone. Even though they are documenting the police, they still have to follow the law as far as that goes. Good way to learn, you have no privacy when out of your home. As for OP, I would report them to the manager on duty when they came in, sat down, and actually doing it. Let them get embarrassed when confronted.

If there's one thing I've learned it's that the 'cool kids' are usually quite successful. In fact, there's been studies on it. The popular kids have the confidence to aid them in the corporate world.

My family had fast food once a month. Nothing wrong with a treat from time to time.

Only 80% of them.

And there are some smaller towns that only have one or two fast food restaurants in them and really no other family priced dining options. Lived in one for four years. It sucked. There was a sub shop and a McDonald’s. And an extremely overpriced seafood and steak house that had no business cooking either.

They didn’t say everyone there is obese, they said they were going to photograph the obese people.