We all have similar examples to the one Andy has cited.
When my primary tree was still public, I created a "Please read before you copy" article for one Civil War era ancestor for whom cousins had attached the wrong military record. I explained why the record they had used could not be correct and where to find the correct record.
You guessed it - another dozen cousins simply attached the article, along with the incorrect military record.
Only one cousin - another very careful researcher - read the note and then researched further to find the correct records.
When my primary tree was still public, I created a "Please read before you copy" article for one Civil War era ancestor for whom cousins had attached the wrong military record. I explained why the record they had used could not be correct and where to find the correct record.
You guessed it - another dozen cousins simply attached the article, along with the incorrect military record.
Only one cousin - another very careful researcher - read the note and then researched further to find the correct records.