Piss-stained concrete paradise

Manhattan is a great place to live, but I do wish there was more greenery at times. In particular, I'd wish the owners of pets (dogs, really) would find another place to take a leak. They piss all over the sidewalk, and I have to watch my step walking the block my building is on. Would it really kill them to make their pets go in the sewer? Or somewhere else besides the side of the apartment? It's something that seems more prevalent all the time. It may be a beautiful, cloud-free day outside, but I guarantee I'm going to run into puddles no matter what.