I guess the risque attire thing hasn't made it to the Midwest yet.  The last race I ran in April I didn't see anything offensive.  Several guys ran without their shirts for part of it, and there were a couple ladies that were just wearing a sports bra.  Definitely nothing more revealing than what one would see at a beach or pool.  I don't want to see the guys wearing the overly short running shorts and potentially exposing themselves to everyone else, nor do I want to see a lady or a man wearing clothes that are way too small or show off the love handles or fat rolls. But policing a dress code for a run would have it's difficulties.

This so bugs me out way too much.  I dont even like running skirts and I know that is crazy.  Seeing a sports bra girl and a shirtless guy I shudder and wanna puke

We don't have the right to not be offended.  If what somene else is or is not wearing isn't harming me, then I don't see how it should be my business to tell someone else what to wear.  Any standard we dictate will be simply relative.  What is today considered modest in America would be scandelous by Victorian or Taliban standards.  So how much do we need to cover up to reverse our 'moral decay'?