
Oo, that bag thing irritates me too Beardy. I saw a rather fetching purple poo bag dangling from a tree branch the other day

What on earth is the point?
I do leave bags when I'm walking the dogs, but always in a spot that I'll be passing on the way back to the car park so I don't have to carry it around, as the dogs usually go within the first minute or two. If they go somewhere I won't pass I'll carry it, and rarely I'll leave it there if I know I'll be back the next day (usually when I've forgotten my cheapo rucksack for carrying stuff :D).
Another thing that's annoyed me recently is people who've moved one of my bags. A couple of weeks back I cleared up after Soli, and dropped it to pick up on the way back - when i passed the spot at the end of the walk it was gone. Completely, never did find it - and a couple of days later it happened again, only this time I found the back thrown into some brambles. Had great fun getting that one back. It does annoy me though - I always make sure to leave them well out of the way of the trails so people don't stand on them (unless they're shimmying around a tree trunk :p).