Leggings. Now don't get me wrong, I love the idea of skin-tight pants (Muffy'll testify to that ;-D), but I have one major problem with them - they're all worn by girls under the age of twelve.
This is just wrong. Leggings, when worn in public and not for use in dancing or equivalent athletic pursuits, are by nature slutty. Girls under the age of twelve or thirteen should not be slutty.
This is worsened by their common-ness. At Tournament of Minds today, literally EVERY (and I'm not exaggerating) primary school-age girl was wearing skin-tight leggings. I even saw a six or seven-year old that I used to look after in the Kindyzone program at my church wearing them. It's just wrong.
So parents, please, stop over-sexualising your young daughters. They're supposed to want to be fairies and princesses, not hookers or particular APHS students.
Leave the leggings to teenagers who have curves, and choose to look slutty simply because they are sluts. Even better, let's ban them completely, and reserve them only for Muffy, who has the most perfect ass ever ;-D