I totally agree with **, when they drive past and beep it literally makes you jump out of your skin! Not because you're frightened of them but when a car drives past the back of you with the horn blaring, it literally is a shock. Fucking twats.
My reaction would depend on my mood at the time (this of course, as a concept, is not understandable by these men who probably have a "smile love" mentality/history too - we are not allowed to be sad, stressed, or just generally focusing on weightier matters than whether a bloke fancies us or not):
If I'm busy, pissed off, sub-par (by their standards) - flick a V at them
Feeling good, carefree (rare occurrence!!) - meh.
I think this speaks to the assumption that women, all women, are just desperately waiting to be shown that they are seen as attractive and that you're the man for us at which point we're desperately wanting to enter into a relationship with them. Newsflash guys: We not and we don't.
Your last sentence GraceMarks is interesting when you view that 'woman walking in NYC' video with the gal in boots and jeans? She flip-reverses it on them - and they can't cope with it! One says "Hey baby wanna get married" so says "Oh yeah, yes I'd love to get married" and he literally takes a step back - arsehole. If I experienced that every day on that scale I'd probably end up being had up for assault because I'd properly lose my shit after not too long of a time.