I don't think that making a bit of an effort to improve our environment can be a bad thing, though I'm not sure I understand why the queen needs to be involved.
Them's my sentiments. Taking a bit of pride in your surroundings, and keeping them clear of litter, is surely something we should all think about anyway, queenie or no queenie.
Litter bugs the hell out of me, since it's based on sheer laziness and thoughtlessness, and trent is right: in principle it ought not to be somebody's job to clear up somebody else's mess just because they're too thick or just too careless to put it in the appropriate place. But they, like the poor, are always with us and there's not a lot you can do about them. Rather than let crap pile up to our knees just to make a point, I don't see why the civic-minded can't chip in and make the environment better for everyone.