A recent comment on this question said that it was not unusual to see the grounded leg of a switched circuit being used as the switched leg, there was some agreement.
This seems a terrifying problem if true.
For me, this was learned in the first week of working in the trade.
I could never have passed a rough-in inspection for something like this the day after a hurricane, of a latrine, at a campground in Florida, where he was so drunk someone else had to drive the golf cart.
Does this really happen often?
I removed my answer that spoke of NEC 404.2(B) due to comments by a user that did not think that a citation of, what is law, in some jurisdictions, was relevent to the question. The argument could be made that this perspective is/was reasonable.