I think a large part of the problems at Loch Lomond are simply because it's so near major conurbations.
If this makes them think about their behaviour, it's a start.
Too many people in too small an area. Not everyone trashes it, many help clean it up, but too many just going for a barbie and a bevvie.
No other public venue would even consider having so many people with such very poor and limited infrastructure around. That's what it is really, a huge public park without enough parkies. There is a culture of littering in the UK, it's disgusting and shameful, but it's there. Until that changes, the alternatives are to clear up behind the numpties or make it compulsory in some way.
Be interesting to see how the situation develops.
cheers,
Toddy