Coming from a very non-religious, socially liberal perspective, I find the idea that a girl wearing shorts is being immodest in a way that is _wrong_ to be relatively repulsive and socially backwards. I understand that you are not outright saying it is wrong, but obviously your contention with the immodest is precipitated by some sort of thought that the act itself is in someway wrong, and if you don't mind, I feel myself at the liberty to infer that you are asserting that what they are doing is "sinful" in some manner, or at the very least not conducive to holy thoughts of your own. I mean, if you are religious and authentically feel compelled toward the religion you are compelled to, you are without a doubt justified in believing as you do and feeling that way about shorts in general. You've done nothing wrong(a word of contention here I understand, but of course this is from my secular perspective), but just the very thought of supporting that manner of thinking is, again, repulsive to me.