"if you get that level derision on mn,imagine rl"
uummm not sure about that, actually
There are threads on here, with names that would have the immortal piss taken out of them by everyone I know IRL - "We're thinking Poncetastica for a girl and Testiculous for a boy, what do you think?" which get almost 100% replies of "ooh lovely." I don't post. I live in a "leafy" part of the home counties, btw.
I really don't think Mumsnet is representative of real life where names are concerned. I have never met any children with 80% of the names I see on the Baby Names threads. Which, to be fair, includes Miley, of course.