Funny story,
A buddy of mine kinda horned in on a spot I hunted a few years back that had tremendous sign, Huge rubs and 6 scrapes in a 40 yard area one being a community scrape. I was pretty mad so I kinda urinated in the community scrape at about 11am, at 5pm he rang my cell phone and told me to get out there, he had just shot a buck. I arrived to find him with the pretty decent 10pt we were hunting, he had his cam corder with him, and showed me this buck in the community scrape digging the heck out of the soil, and he shot him in the scrape, needless to say I dont think I will ever do that again, It benifited him,LOL, but seriously, I have urinated many times near my stand and it does not seem to bother them.