I will be banning mirrors in my house! 
I saw a similar sign at a crocodile enclosure in Darwin, Australia. Very close to the cage containing Brute, the crocodile who featured in a famous scene from the first ‘Crocodile Dundee’ movie.
When I first saw it, it cracked me up!
At least the tube amp can keep you warm and won’t talk back! (just kidding).
Good one
Doesn’t work for me b/c of the DSOTM motif - its a “non-sequibeer”, if you will.