Not all ideas are good ideas and just because you can do something doesn't mean you should.
I mean, hell, we've all been here before. Someone 'inceptions' some wack idea into your head and you decide to run with it but all it does is lead you down a road of utter insanity.
These people certainly fail pretty hard at recognizing when and idea is a bad one. When they sat down in that barbers chair and gave him their instructions they really should have thought about it twice.
But the barber's response of "Say no more..." doomed them to be on this list.