Also, unwanted advances does not equal harassment and assault. You just say no to it and move on. I'm not saying unwanted sexual advances are cool nor am I say that men who make them are more masculine than men who don't. I'm saying that you can simply say no to it or tell the guy to go f off and does not require an entire movement.
Well, the reason there is a movement is that "saying no" can have very drastic consequences for women. The best case scenario that women can hope for is what you mention, but countless women experience the opposite end of the spectrum through no fault of their own. I have personally experienced the full gamut of responses when I tell a guy "no thanks" (and I'm married!!) -- many men are, as you say, respectful and simply move on. Others, I've had suddenly get in my face (imagine this as a smaller, weaker woman having a larger, intimidating person in your space-it is all about power imbalance) and call me a bunch of nasty names ("stuck up c**t) just for politely turning them away. I've had a guy completely ignore me, sit down next to me and put his arm heavily around my shoulders and hold me there so I couldn't get away. This one, I actually had to elbow really hard to get him to let go, and then he got very angry and he literally spit on me. I've also turned away someone gently, and then later had that person follow me into a dark parking lot "to talk alone". When I told him I didn't want to talk, he continued to follow me so I ran back inside to ask for an escort to my car.
The problem is, you can't tell what kind of reaction you are going to get. "Is this one nice, or is this one going to follow me home or threaten me?" is always in the back of your mind.
My husband didn't understand why I'm always on guard walking in parking lots. To him, it's just a parking lot and he's just going to the car, nbd. But to me, my head is on a swivel. I'm watching for movement. I'm glancing behind me to see if there is anyone following me. I have my keys out, and I check my back seat before I get in the car. Basically, my husband just walks to the car, while I am protecting myself from being raped. That is the difference.
So yeah, it would be amazing if every man was respectful and actually listened to us when we "just say no". But in reality, it doesn't happen for far too many people. THAT is why there is an entire movement. Too often, women just existing means being harassed and intimidated.
Anyway, I'm sorry to have contributed to the side track that this thread has gone off. Hopefully we can get back to the OP. Just wanted to clear up that "just saying no" isn't so simple.
edit: and this doesn't include situations in the workplace--what are you supposed to do when it's your boss or other authority who is making a pass at you? When there is so much room for retaliation, black-listing, affecting your reputation, it is a very difficult thing to reject someone who has power over you. I haven't experienced that, thank goodness, but it really puts some women between a rock and a hard place: "do I say no and deal with the potential retaliation (being fired, demoted, duties removed, bad reviews, etc) or do I ignore it and still put food on the table?"