Pooper Scooper?...Nein, Danke

I like Berlin, and I like F-Shain, but I'm mystified by a culture that separates their garbage before throwing it away(4-way recycling/garbage cans), conserves energy, drives small cars, etc., and yet, by and large, lets their dogs crap all over the place. The dogs do seem friendlier here, though I'm not sure if that is related.