I mean, doesn’t sound like you were mean. It’s selfish and lazy not to clean up after your dog. I’m sure he - personally - doesn’t enjoy stepping on 💩. Don’t do to others what you don’t want others to do to you, is a good moto. Hopefully, he’ll remember next time and no one has to point it out again. Truth be told, we all need reminders of social responsibility. My wife reminds me all the time to put the lid down. It’s only the courteous thing to do. When I do it and she doesn’t have to remind me, it’s peaceful for her and for me. We all win. A win-win for everyone.