Eh. I think there is a lot of subjectiveness about what makes something harassment vs. someone trying to pick you up vs. someone that's just clueless and stupid vs. someone that's actually a threat. It can be difficult to differentiate sometimes. But generally, speaking only for myself, catcalling has never bothered me. I'm sort of oblivious to it, it's just background noise. To me, it doesn't actually MEAN anything. I've had guys hit on me, tell me I have a nice ass, and... whatever. Maybe I have thick skin or maybe I'm just naive but unless I feel like the guy is a predator, nothing they say really gets under my skin at all, even if it's not really appropriate. I'm not entirely a person without exposure to predatory behavior, mostly when I was young - some slightly traumatic things happened, but I got over it and moved on from it. I guess I just like to live in happy oblivion? Give people the benefit of the doubt? I feel like I have a fairly good grasp on character whether or not someone feels actually creepy vs. stupid. I dunno... but what a lot of people consider to be harassment is not something that I feel to be as such. It's such a personal experience, and you feel what you feel, you know? If you FEEL harassed, then you are. But there is almost no way to draw a clear line between the various shades of that behavior across the board. I've worked in the outdoor industry for almost 15 years now - I've experienced lots of bad pickup lines but never really dealt with anyone I felt to be an actual threat to my person. At the club, in college? Yeah. But out in the real world, not so much.
It's an interesting discussion though, from a psychological perspective.