haha no, I do not...but it has happened a few times in my life, and I was pretty glad I was wearing shoes when it did. at least then I can clean up more easily. I will note that I am more likely to step in gum, and I think I've only stepped in dog shit once...when I was pretty young.

I think it is a silly reason, but I think that's sort of at the base of the policies...that and the fact that it's the norm and not to require it means you need to think about it more carefully when most people probably don't ever think about going barefoot.