Wasn't it "This page intentionally left blank." And, of course, it was perhaps INTENDED to be left blank but now it has writing on it.
Now appearing on Rx bottles everywhere "Take by mouth". Wow! consider the possibilities! "Uh, Doctor, I took the medicine and it didn't do anything to help my condition. In fact I'm worse. Now I can barely hear a thing! What's that you say? Eh? Oh, no I stuck them in my ears."