Yeah, I've seen that a couple of times. Usually as a result of their being 'the right way' on a sink on the other side of the wall.
However, a lot of years ago I got a clue in life when the landlord (who lived up the street) left a note on my door that looked like a 3rd grader had written it to the effect he'd (finally) come to replace the washers in the shower to fix the drip. The handles were back on backwards??? So I conducted a little experiment, I misspelled his name a bit on the next rent check. When I took it up after dinner on the first, I stood on the porch (on the other side of the screen) while he examined it (as he always did) and thanked me (again, as he always did).
I was paying a large part of my hard earned money to a guy who couldn't read and write! His 9 YO son really had written the note to me. My money, down a 'rent hole' to the benefit of a guy with less going for him than me? I bought a house not long after, took everything I had and then some, but the best move I ever made in the long run. Over the years, as rents when up, my mortgage went from 'too much to pay without a roomate', to 'about par', to 'embarrassingly low' relative to my workmates. A lot of years ago, but I never did thank him.....
All because a guy didn't know the difference between H and C. Life often turns on fun things like that IMO.
OF