Sorry, but if you’re going to try to protect her from every potentially scary/uncomfortable/dangerous encounter with men, be prepared to be her 24/7 body guard. That’s life for women. If she’s not asking you to protect her, I doubt she’ll welcome you constantly stepping in and doing it of your own volition.

I feel like you’re scratching for justifications to tell her not to talk to certain people. Bottom line, if she hasn’t given you a reason to mistrust her and she isn’t asking you to run interference between her and other men, don’t do it. She will not appreciate it.