This report is a little dated, but it seems not everyone thinks it's "fun"...
https://www.peppermintbars.co.uk/flares-and-smoke-bombs-into-football-matches/
I'm guessing the club hasn't issued a bottle top style edict, as its illegal to take a smoke bomb to a game, in the same way as they...
I posted this on another thread, OK this is about flares, not smoke bombs, but hey, just having fun, eh!
https://www.google.com/amp/s/www.walesonline.co.uk/sport/football/football-news/wales-denmark-romania-cardiff-giggs-15417096.amp