Usernotes are like post-it notes, if you put enough on somebody they'll eventually be completely covered in them. Since the adhesive never wears out their outer shell of little yellow usernotes will become thicker and thicker, and once their eyes are covered the effect will be awesome ^_^
Sadly, I'm too young to post usernotes on other people D= But if you post usernotes on me I reply by sticking another one on myself =^_^=