lol, ya, I saw that pic. Have you seen this one?
I think we're in agreement here. Dog owners should clean up after their dogs. (At least in the city.) It's just common courtesy. Otherwise we'd be knee deep in shit (bags).
I think if you're out in sparsely populated areas you can just let it lie, but it just breaks my mind when I see a bag of dog shit hanging on a tree out there too.
It looks like an empty bag can also be used as condom.