Actually I've got plenty of leather..ahem.
I know what you're saying, I remember a previous post, probably yours, saying the same about punk rock and how 'real' punks look down on MTV 'punks'...etc... ( To my mind a qualitative difference does exist here, there is after all nothing punk about MTV, in fact it pretty much antithesises the whole DIY ethic but that's another debate... )
I've not encountered any 'I'm more hardcore than you are and therefore I'm better' shite amongst my vegetarian/vegan friends, although people will discuss issues I don't think they attach a value judgement, that may just be my experience though.
My communication with the BDSM 'community' is pretty much confined to these pages and I'm happy to say that I thankfully haven't seen any evidence of these prejudices here. Is that your experience of another BDSM community?