I own Uggs and I've been wearing them recently because it's been quite cold here...
But, I will say that I hate when "preppy" girls will where a skirt, a tank and Uggs. Let me put it this way, if it's the summer or spring time, there is absolutely no reason for these (and I'll use Toob's word) whores to be wearing them. They think they look cute? No, they look like a dumbass wearing Uggs in 80 degree weather.
And also, Uggs aren't even supossed to be worn out! They're for wearing at home... they don't do good with water, dirt, rain, etc...
Wear 'em only at home if you're going to buy them or already have 'em.