In most circles its better to not have so much cleavage on show, if you have your all your legs showing and vice cersa. PVC thigh boots look pretty much out of place anywhere, although I have see a few goths pull it off without looking s1utty.
Its only perception after all. I know some girls who reveal loads when they go out but they couldnt be farther from tarty in personality.
People also complain about kid/teenagers wearing short skirts but surely this is the age where it looks less ridiculous.