If I'm a good looking guy, present myself well, am well kempt, and compliment a woman I pass by on the street at night, nothing about it would be taken threateningly. It's all about presentation.

Why do you think well-kempt men can't be rapists? Well-kempt men are frequently rapists!

you can't tell much from the two guys about their appearance.

Again, what the hell does their appearance have to do with anything?

Lots of people ARE minimally polite. In fact, I'd say the vast majority of them are.

I agree with you. But you know who doesn't fall into that category? Anyone yelling at a women walking by herself on the street at night!

The fact remains, based on what we see in the comic, the guys never moved.

Who cares?! It's still scary; it's an action that opens up a dangerous path, and that makes it threatening even if no further steps are taken. I feel like you're saying "this bad thing wasn't a worse thing so therefore it's not even bad at all."