Definitely not an overreaction

If there is a situation where an adult needs to be in one of the restrooms, it should be an adult of that respective gender

I can’t imagine why a male teacher/administrator would ever put themselves in a situation like this that could lead to allegations anyway. Most adults I know that work with children are very careful with their boundaries just to avoid any accidental drama they don’t want

His actions are SUPER weird and it’s even worse if there are many girls reporting it- meaning he is making them feel uncomfortable.