If you were going to pee down your leg (I don't, haven't since I was about 6) wouldn't you just wear synthetic wicking fabric next to your skin, that way the the moisture won't cause a rash or discomfort? Surely you don't actually wear undies under your running shorts? How can the ladies hope to get a good view if you do that?
And as for stinky shoes, if you're sufficiently well hydrated, your pee is barely distinct from water. "accidentally" drop a cup of water from the drink station down your legs and nobody (including you) would be able to tell the difference!