I don't recall this being the case a couple decades ago. I seem to notice it more and more, that when I'm nice I'm treated like crap and when I'm cruel I'm respected. I'll have people push me in public places and others side with the pusher when I complain, only to stop yelling at me and putting me down the moment I give them the bird or yell "idiot!" at them. If I don't do these 2 things, they'll continue lecturing and yelling at me and putting me down and criticizing me for long minutes, even though I was the one pushed, not the pusher! They however stop IMMEDIATELY once I denigrate them. Go figure... Since I'm always alone in public, I'm an easy target (petite, decent, middle-aged woman) and I've to fend for myself. I tried all kinds of ways for years, all of them kind and polite, but the only one that gets me respected and makes them stop AT ONCE is to humiliate them.
I believe the reason is that, in today's world, PR and diplomacy and self-marketing and public image have become such enormeous, out of all proportion assets to have, that when people see someone who doesn't care for their own public image (by yelling "idiot!" or giving the bird, as a woman), they automatically believe the person is insane and become afraid, and they respect you in order to not get in trouble. Because people nowadays only know how to deal with others who are as public-image dependent as themselves - they have no idea how to deal with someone who doesn't care losing their public image, like me.
Another reason is that people tend to behave more nicely the more they need the other. So the other tends to see someone behaving nice to them as someone who "needs" them, therefore they feel they can treat the person as they like.
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So-called white lies are like fake jewelry. Adorn yourself with them if you must, but expect to look cheap to a connoisseur.