I used to pee in a bottle, but no I just let it go. Can't tell a difference in the number of deer I see. I've got friends that make fake buck scrapes and wizz in them, then put a camera up. Sometimes within the day bucks are already checking the scrape and peeing in it. I don't think they can tell the difference between our pee and another animals. The most important thing is to hunt the wind. If you don't do that, nothing else matters....and if you get the wind right, nothing else matters! Except during the peak of the rut, and then all rules are off!