I’ve literally been in a public restroom where a dad knocked loudly and announced “I’m a dad bringing my 3 year old daughter in to use the restroom. Is everyone decent?” And it’s was me and a friend and we had no objections. Little girls should be allowed to go potty in a clean restroom with a trusted adult if there are no family restrooms available. That old man is a weirdo for making it a big deal and scaring those girls.