That’s… not the problem. And even if it was, the solution is absolutely not “I guess I’ll shit in that guy’s yard”. Go into a hotel lobby or coffee shop or bar or whatever, ask for the restroom (use your phone as a translator if you need to, because that’s a thing now), and do it there.
There is no reasonable explanation here except inadequate availability of public restrooms for the amount of tourists.
That’s… not the problem. And even if it was, the solution is absolutely not “I guess I’ll shit in that guy’s yard”. Go into a hotel lobby or coffee shop or bar or whatever, ask for the restroom (use your phone as a translator if you need to, because that’s a thing now), and do it there.