It’s a smoke bomb. Not a flair.
Yes it is just a bit of fun. If it was really that much of a problem. We would have a message from the club by now. But you see them using pictures on our main media outlets so the club clearly not that bothered.
Stop being a miserable old fart. Might not be for you. But if they want to take the risk and enjoy it. Let them crack on. It’s the first generation in about 30 years where we actually have a young set of supporters going to games.