Park your car where you are supposed to, stay on the trail, don't use a drone if it's not allowed, carry out your trash, don't feed the animals, don't leave your toilet paper under a tree, etc.
Sure I get annoyed when people take too long to snap their photo, but I also get annoyed at people at the grocery store, on the train, etc. You just have to deal with it and go on with your life! Just because some one else likes to take pictures, doesn't mean you should shame them for being a "millennial influencers". But we all should shame the people who don't follow the rules (and these people have been around since before instagram).