I don't think the person who wrote this meant it to say "Follow these rules or I'll laugh at you and you'll be ugly!" I think she's writing it to help you dress to fit a certain aesthetic feel, if you want to.
I know what she means when she said she was sort of afraid to write this. I really hate it when people jump on other people for explaining the fashion. You can take what you want from it. I personally don't care if you do it strange or in a different creative way, but it can't be still classified as lolita if you change it too much.
But good guide ^_^