Dr S, where I live, near Loch Leven at Kinross, there is a footpath/track around part of loch. There are plenty of dog-shit decorations hanging from fences, bushes and trees. Other trails locally have the same thoughtfully placed shit bags.
Don't know if any of you have ever been up to Loch Morlich, in the Cairngorms near Aviemore, when the sled-dog races are taking place, I have seen it twice. Not to watch the races obviously. All the trees lining the trails through the forests are festooned with bags of crap hanging from the trees, shit everywhere. There are 100's of dogs and you can smell the shit downwind.
The guy in the shop at the campsite hates them, said he'd rather not have the business than see the mess that is left by them. I've been back later in the year, summer, and there are still bags hanging in the trees well out of reach, just flung there by the dog-racer arseholes.