I remember this stupid rule!!! I don't think it was enforced by the papertowel police. Atleast, I never saw that it was. However---the papering of the mirror ticked me off so bad. My contact lens was killing me one time and I went to take it out and there was that stupid brown paper. I tore it down and just shook my head. Nobody said a word. This practice stopped (mid 80's?)
Meow