Asking for a friend.
Pretend you're out on a run and have a poop emergency.  It's dark, and you're running through a park, on a reasonably secluded path by a lake.  No chance you can hold it until you get home, or to the nearest bathroom.  No real bushes anywhere nearby, but also no worries of anyone seeing you.  There is a big trash bin/receptacle on the path.  Do you:
- #### yourself
			 
- #### in the lake
			 
- Get as far off the path as you can and #### on the grass
			 
- #### in the trash can
			 
- Other?  (Please expand)
			 
Unfortunately the best opinion I could share with my "friend" is 
@ChiefD's, but he's too busy knocking-out 16K runs to be bothered here right now.