My motivation to learn print was to read restroom doors when the signs were 
readable.  Braille signage has been one of the wonderful improvements in the 
last 20 years.
I don't know, that's a harmless prank.
Nobody got hurt.
Another story
A friend of mine came to visit in the dorms for a couple of weeks, after he 
had graduated college.  His brother lived there, but I had a double room, so 
he stayed with me.  Anyway, their were a bunch of blind students that often 
hung around in my room, he thought it was great fun to sit around naked as 
the day he was born, knowing that nobody could see him.  Well after two 
weeks of that, one of the girls did something that only a person with some 
vision could have done.  She later said, that she had been enjoying watching 
him for two weeks, and wasn't going to let on that she could see all their 
was to see.