Sadly, when it comes to football fans, there are those who do, repeatedly, which makes it just a matter of time before there's an awful accident. This week, both Celtic and Rangers have been fined - again - for pyrotechnics lit by supporters in recent Uefa matches. An away fan ban is in there as well for Celtic, albeit a suspended one.
Original Source:
https://sports.yahoo.com/fans-no-pyro-134950302.html