This happens way to often. I write a polite invitation to chat on a woman's Private Message link. A conversation begins and things are going well then, they disappear. I've begun to put 2+2 together and find that most of the time the woman has gone to my page, apparently discovered she doesn't like what she sees, and abruptly closes down and won't talk to me again.
OK, fair enough. You don't want to talk with me it's your right and privilege not to do so. However, if a woman had any etiquette at all, she would at the very least say something like; "I'm looking for something else here and you not my type - Bye". It's a short sentence that says it all.
By the way guys, it goes just as well for the men when talking with others too.

If it is a matter of size, looks, or status, then so be it. Small minds not open to anything but a set view of the world or it's many, various inhabitants are truly missing the variety the wold has to offer. And that's OK by me because I would rather get to know people who are truly interesting than anyone with closed mind.