some women are more sensitive than others. if she tells you that she doesnt like the way you are looking at her one time.. thats not sexual harrasment. If it continues or becomes explicit words or requests, its then harrassment.
Hope that clears things up. Looking can be fun when both parties enjoy it. This is why I often tell women that they need to figure out who they are sexually and what they like as soon as possible because we cant expect men to know what we dont know. However its not always possible. Some women are shy. Some girls group together and become bullies to the smelly kid.
Another anicdote of mine. I played "chase" with the boys as a kid. I had a crush on a kid and had my first kiss with him in a car at a football game with 2 other boys watching. I had no idea what I was doing, they had no idea what they were doing. but i wasnt scared because i was in control. then later it got around that i liked to do that sort of thing and we were playing the boys chase girls game. one boy in particular chased me and i didn't like him. i literally hid from him underneat some short stairs but OH he found me. He then got ON TOP of me. I'm claustrophobic so i was screaming and he literally just layed on top of me and nothing else. I finally got away and that time I DID tell the teacher. He got one day of in school suspension.
It is circumstantial and it is complicated but the essence is UNWANTED attention. Its the same way for guys as it is girls. If a girl was staring you down that you didn't like, you would either tell her or leave. But what if an entire room full of girls were staring you down that you didn't like? What if the girl you were disgusted by was multiplied and on every street corner, leering at you, and telling you nasty shit and about her nasty vag.
You wouldn't be upset?
I really think that you are underestimating the situation. I don't think things are as minor as you believe them to be and i really believe that MOST women would rather brush it off than deal with conflict .