It's all well and good not to "kink shame" but surely society has to draw the line bloody SOMEWHERE?!
I'd argue that the line should be drawn well short of anything that could be construed as harmful in any way to anyone.
My socially-liberal instincts leap to agree with people when they say that if they're not harming anyone else, they shouldn't be shamed. Whatever my personal feelings on an activity, my automatic position would be that if there's no harm, there should be no shame, disapproval or taboo, and that what people do in private or in agreed venues (and with consenting others) shouldn't be the subject of opprobrium.
But with kink, fetishes, and other sexual turn-ons, tabooness — something being forbidden and naughty — is a big part of what gets some people going and gets them off. If we create a society where the only things which are truly taboo, and the only things which are considered disgusting and shameful, are things which actually merit taboo, disgust and shame because they're harmful to others, that means that anyone who needs taboo or shame to get off is pushed towards things that are actually harmful.
So despite my socially liberal leanings, my pragmatic side suggests that it's a social good for people to have access to a wide array of shameful, taboo, but ultimately harmless sexual pursuits, and therefore we should societally continue to ridicule, criticise and disapprove of certain harmless fetishes and deviances where part of the appeal for some people is the shame, humiliation, or risk of being caught.
(Obviously this wouldn't include things like sexual orientation, where shame makes no difference to it and only causes suffering.)