I hate pleated anything, but especially pleated skirts -- I think that the pleat has got to be the least flattering fashion technique ever invented.
Seriously, does anybody look good in pleats? It you're skinny it draws attention to your concave-ness, and if you're larger you look like you have a balloon belly.
That's why I've never understood why so many school uniforms make use of pleated skirts. As far as I'm concerned, that's just one more way to make kids unhappy at school, and one that could be easily avoided.