There are historical examples of this in some alleys in central London (https://www.exploringgb.co.uk/blog/9th-century-urine-deflectors-in-london https://www.ex

There are historical examples of this in some alleys in central London (https://www.exploringgb.co.uk/blog/9th-century-urine-deflectors-in-london https://www.exploringgb.co.uk/blog/9th-century-urine-deflect...). I remember being unpleasantly surprised by one after a particularly heavy New Year's as a student.