I always thought it was kind of funny. I can tell the difference between human, cat, dog, and deer urine. Deer can smell hundreds or thousands of times better than humans, yet they can't tell the difference. To me it's just laziness if you can't carry a gatorade bottle to pee in, but hey, it's your hunt and you can do what you want. As for me, only under desperate conditions would I pee off of a tree stand. After all, we should be trying to minimize human odor in the woods. Why not take the extra effort to keep the urine smell out too.