Back when we lived without phones, we used to read instruction labels on all and any household cleaning products that were stored in the bathroom. I bet there too was some obscure newspaper column that advised against that. Yet, lo and behold, we survived!
Many share houses, when I was a student, put the film calendar for the local art house cinema on the back of the toilet door. It was the accepted place for it.
Reading on the pot is a time-honoured tradition.