Yeah I have heard of and seen people doing this. My own take on it, take it at face value
Seeing grown "men" in their mid 20's trying to catch Pokemon is rather depressing to watch, not because they are crap and don't catch anything, more the fact that they are walking around like zombies glued to their phones, children in adult bodies.
Dude, I'm 23 and I am kind of enjoying this. *blush* It's out of nostalgia.