I'm probably getting into some controversial and murky waters here, but I just have to say this:
TIGHTS ARE NOT PANTS.
They will never ever be pants, no matter how much you might wish it of them. And unlike pants, tights are not forgiving and we can see everything. Everything. And I need to stress the importance of this. Tights are, for the most part, pretty darn see through. Which means that even if you're wearing black tights, I can still see your spongebob underwear. I don't want to see your Spongebob underwear. I'm sorry to break that to you. I like Spongebob and all, but no. Just no. I'm sure you've scarred quite a few kids walking around exposed in this way. Please, give everyone a break, and trade those tights in for a nice pair of capris.