Another suggestion is to photograph the rough-in, after all plumbing and electrical work is complete. This allows the home owner and any other trade concerned, to see specifically where the rough-in work is constructed, and plan in advance if they need to install screws with more than 1.25" of embedment in the stud.
Whether the home owner will have the presence of mind to check this photo / remember where it is, is another matter entirely. But it is a good start to at least have the information available when the house is first turned over for occupancy.
