No, not every woman in a short skirt wants to hear your life story at the bar, sir. No, that waitress smiling at you while delivering your burger probably doesn't want to run off into the sunset with you, she just needs to be friendly in order to pay her rent and avoid a bad Yelp review. Sure, there are some "meet cute" scenarios when sparks fly between two strangers, but assuming someone is interested in you romantically with no evidence other than the basic bare minimum good manners is often a dangerous and disrespectful path.
So, when a Reddit user asked women of the internet, "what innocent behaviors have you changed out of fear you might be mistaken for leading men on?" people were ready to share the actions they've adjusted to avoid sending potentially mixed signals.
Like general affection, even with hugs and compliments I'm pretty reserved unless our relationship is clearly drawn out and we both know that nothing is being implied - ColorMeCuriosity