Halloween Costumes- A Rant

Yesterday I was browsing around a local halloween store for costume ideas. I was sickened, however by how skimpy a lot of them were, and the worst ones were marketed toward teens!
Any other day of the year they would be considered borderline-pornographic, and yet this is what we're encouraging our youth to wear?
I tried on a Dorothy (from the Wizard of Oz) costume and it didn't even make it half way down my thigh! If I had bent over I would have flashed everyone.
Dorothy is portrayed as a child! She's not a prostitute, so why are they selling costumes that head that direction? L. Frank Baum would be rolling in his grave if he saw that.
Gah! It just grinds my gears. Is this what halloween is about now? Looking as "sexy" as possible?

Anyway, it really really bothers me. But speaking of halloween, what are you guys going as, if anything? Any ideas for my costume?
Comment! Discuss my incoherent ranting. You know you want to.