Actually it's quite healthy. Statements like "whatever bull crap you said...." show your unwillingness or inability to comprehend and debate what was said. This is unhealthy.
I'm not saying it doesn't exist, but it exists through the fault of those who are seeking the person who has rejected them. If they just moved on and found another woman or man, it wouldn't be a problem. It's a very simple concept.
Standards? I use standards. They're a necessity. I know the sort of people I get along well with and hence, the standards are merely a way of cutting down the potential bad relationships by an enormous margin. I don't see why you shouldn't utilise your own self-knowledge to make any relationship (of any kind) benficial to both participants. If you know what you like, chase after that.