Cab Driver Taking a Leak Outside My House

This happens all the time. Delivery men dropping off packages in the neighborhood, old men on walks, lots of cabdrivers...in broad daylight, in a residential area with houses to either side, they take leaks on this vacant lot across from my house. They look around to see if anyone's around first, but when they spot me they don't seem super embarrassed.

I can't figure out why. In an emergency maybe, but they're just so "doop-de-doo" about it..."ah, a vacant lot, might as well drop everything and take a piss".

Right after this cabdriver finished, he got back in his taxi and drove off. I wondered why he hadn't just gone to the public toilet at the park just down the hill, it's not very far at all. And it has the added benefits of being able to wash your hands afterward.

Then it occurred to me. Maybe this vacant lot IS his public toilet. He didn't seem to have any passengers or anyone to pick up here- maybe he drives to this vacant lot for the specific purpose of taking a piss.