You could keep them out of schools by banning faith schools, but that’s rocky ground. I doubt it’s as bad these days, but knives and blades were common.
By no means glorifying it, but football‘s spark has lost its grimness. Yes Old Firm and Easter Rd Capital City Service both shocking for getting slashed. Watching Forest and Notts County doesn’t really compare, unless it was Leeds, Stoke, Sheffield Weds/Utd, Hull, Cardiff and the capital city lot like Millwall, Chelsea, ICF and Spurs. Smaller clubs in cup games could be the sketchiest - Oldham, Walsall, Darlington and Hartlepool, Plymouth (savages, just look at America), Tranmere, Man City...
Football is increasingly grim Britannia and Europe has it too.