Wow, there are some REALLY gross stories here. About two years ago, I watched two grown men pee against some bushes in our local Six Flags park, not ten feet away from my family. I would have given them hell, but my DD17, DD11, DW, and DMom hadn't noticed them, and I figured if I said something, it would just draw their attention to the two guys standing ten feet away with their junk hanging out.
As for letting my son pee in a bush on a 90 minute line, no way, no how, not a chance I would EVER stand in a line that long to begin with. Heck, DW wouldn't be able to hold it that long, let alone DS5. We live in a fairly rural town, and I'm not going to say that I've never let him pee in the woods, but certainly NOT anywhere in public, that's just gross.