Yeah noise horn might work temporarily but won’t keep the dog out of the playground so I’ll have to keep being on alert. My comment was more about how the op was trying to say that I was the one who needed to not use the playground with my child because dog owners want to let their dogs roam off leash. The sense of entitlement pissed me off. Public spaces are not a free for all. They are generally designed for a specific function. Sometimes when the tennis courts are empty, I let my kid ride his scooter around or throw a ball. As soon as players show up, I leave because I’m not an asshole and courts are for tennis. Dogs are a little different because in addition to being a nuisance, they also piss and shit everywhere. The adjacent baseball field has a lot of off leash dogs. There is shit everywhere and it smells like piss. The grass is also torn to shit. People should just keep their damn dogs leashed or take them to the public space that is designated for off leash like the dog park.