I wonder how people like this feel when they go to register the name or tell people outside their circle? Their insulated idea of it being great and unique must surely start to break away.
I wonder what registrars must think, when faced with parents who've chosen ridiculous names, but not ones that are objectively offensive that they can thus refuse to allow. Am I right in thinking that it would be the same registrars who meet and assist adults who decide to change their names officially? If so, I bet they get some babies and make a mental note to look out for them returning on their own in 18 years' time.
It is the parents' decision, but it must be heartbreaking when they come back down to earth again, hear the reactions of people outside their immediate family/circle (who don't go out of their way to mask their true thoughts) and slowly come to realise just what they've set their child up for, for life.
I know it's a MN cliche, but I honestly think that, if you're considering giving your child a very out-there name, it's a great idea to start introducing yourself as that to new people you meet for a few weeks, and see what reactions you get - or even just strike up conversations with strangers and mention your sister/brother (who may or may not exist) and pretend that their name is the one you want to saddle your baby with, as that might elicit a more honest response.
I used to know a woman who changed her own name from a very normal one to a 'nature name' - e.g. 'Caroline Peters' changed to 'Harvest Moonshadow'. She was known as being eccentric (in a lovely way) and was more than equipped to deal with the responses she got; but that was her own choice for herself as an adult. If you truly want to embrace the world of wacky names in your life, give them to the person you see in the mirror, not some innocent person who has only just entered the world and has no choice in the matter.