Chap's a bus driver. Not sure what kind of buses he drives, but obviously he'll be more aware than most about the dangers of this kind of thing.
And because under-22s now have free bus travel anywhere in Scotland, there's been a huge increase in incidents - particularly related to buses and bus stations etc - as teenagers rampage round the country on their free buses, courtesy of the SNP Government (actually, it's English taxpayers subsidising it all, in effect - but, I mean, austerity and all that

).