No one wants to be rejected, but no one wants to be expected to be passive. Nothing is stopping them from doing so? I don't think centuries of socialization isn't all that easy to over come.

Facing rejection is the pitfall of being the active agent in socialization. Yes, rejection really sucks. Yes, it's nice to be pursued. That's part of my point--we need to get away from this mindset that women are "gatekeepers" and have all the power to reject or accept sexual advances, and that they're a slut if they pursue sex. I know I'm grossly oversimplifying it, but it is something that I think it important to work on as a humanist.

As for not caring about being called a slut and just ignoring it... couldn't I say the same about rejection? So someone you don't know isn't interested in your advances--why would it bother you? It bothers you because being thought of and treated poorly by others sucks. Also, there is something to be said for slut shaming beyond just how the individual feels about it--it's reflective of how society as a whole values the agency of women (and men).

I think having tons of partners out of long term relationships makes you a slut regardless of gender, but people want to keep slut as a word exclusive to women apparently [women and feminism included; so they can bitch about being called one and say it's sexism]. I also don't think "slut" is a bad thing.

Well bully for you? Heh. I haven't seen anyone insist that "slut" only applies to women, but I think you have to recognize that it is used to insult the vast majority of the time. You can think the term isn't negative, but I don't think you can reasonably ignore that most people mean it in a negative way.

I don't think you're off in crazy land or anything, but I do think your perception on the topic is heavily biased. Women can and do sometimes buck the "passive" bull and face rejection, but few men are slut shamed (if any really?). Slut shaming, and society's view that it's acceptable, can and does sometimes lead to violence against women. From the way you talk about it sounds like you think a woman sits down at the club, the men form a line in front of her, she picks the one she will open her gates for, and then tells the others they're ugly before sending them off.