It’s becomes creepy/scary when the guy doesn’t take no for an answer, or becomes aggressive when you say no.
Most women won't be saying no and for good reason. They will just try to excuse themselves out of the interaction, or give out a fake number to temporarily satisfy him until they get away from the situation or anything along those lines. Very rarely they'll say no because dudes will then overreact to being rejected and sometimes act violent (no doubt this comes from the ideas implanted in their heads by TRP/PUA). Many guys, when women exit the convo without actually saying 'no', end up confused what happened in those interactions. They don't know if they should've asked for a number or not, or if doing so would make women feel uncomfortable as maybe she thought it was just a harmless conversation as they're trying to be careful not to make anything sound sexual at the beginning. But the guys who do, they already reached a point where they don't care about what she thinks.
Also, why couldn't you start a conversation with a guy you find attractive in those exact same situations?
Also, the whole know your audience thing comes into play too. If I’m in a bar, or waiting in line, or idk any number of other things it’s one thing. But if I’m clearly in a hurry, or in the middle of doing something like loading my car full of groceries. Not now. Seriously.
This one I agree with but you can still feel unsafe in a bar or waiting in line if you don't particularly want to talk to a guy. Obviously if you're in a hurry and have your hands full with heavy bags then that's a no. It still doesn't change my point though.
One of the biggest reasons “men are scary” is that I KNOW how much stronger a man is, than I am. I’d put up a hell of a fight, if it ever came down to it, but I won’t win on power or speed (and I’m a runner). Then add in the experiences we all have, with creepy dudes, at best, and downright belonging in jail dudes at worst.
Then what's the point of having courtship rules if it means being in a situation with a man that's much stronger than you if he decides to become aggressive at some point? Couldn't you make the first move while having escape options? I know women plan escape routes before going on dates with men, could you not do the same here? For dudes that belong in jail, most men are not gonna be like this. The experiences you have with creepy men I guarantee comes with their facing these exact expectations I was talking about earlier. I genuinely don't think most men would feel the need to do this if we actively told society not to make them conform to those expectations.