I used to have a book when I was a kid with a bunch of prank ideas and general mischief shit in it. Think baby’s first anarchist cookbook. Anyway there was a whole section about reprogramming these signs and theyre extremely easy to fuck with. Most of them still have the factory PIN (0000) and it’s as easy as googling the manual with your smartphone to figure out the lettering. Would recommend.

Sometimes we don’t need a wall of text!