I personally don't even let my dogs on anybody's lawn, I feel it is their property and we need to respect that. My dogs would never go potty on anyone's grass unless they were kind enough to leave out pee pads on it , lol otherwise they truely have no idea grass can be peed on.
I also hate seeing all the big yellow dead spots all over my lawn by the sidewalk, it takes a lot of time and money to have a nice yard, then some jerks thinks it ok for them to let their dogs ruin it, grrr!