Did you care?

I can't really imagine myself caring.

Even if he doesn't care (I personally wouldn't), doesn't change the fact that the guy couldn't even take a proper bathroom break because of arbitrary time constraints.

Do you have kids? Does his neighbor have kids? Maybe he has sensitive plants and the acidity will kill them. It doesn't matter. Some rando is pissing on his property. It isn't a huge deal, but it is unpleasant.

If someone is under so much pressure at work that they have to piss in my yard, then they're having a far worse day than me. As far as I'm concerned, they can piss anywhere they damned well like.

The point of saying that the UPS driver was pissing in his bushes was that the UPS driver doesn't have time to take a restroom break and has to grab the best opportunity he can find.

It's not about the property owner's feelings. However, even that can be viewed as an externality that UPS is pushing onto third parties.

Right, but that's probably why I wouldn't be so upset at the person, but at the company that's forcing them to.

A dog could piss in your bushes and not care, all the same.

I care more about the fact he was put in a position he had to do it than my bush.