I remember a story about someone trying to be clever by getting a license plate spelling "NULL" because in computer systems a field with an empty value is often symbolized by the field having a value of NULL (notice my deliberate use of the code typeface), and they thought that the computers used to analyze the speeding camera footage would confuse "NULL" and NULL, ending with them not getting a ticket.

The computers meanwhile had no problem differentiating between "NULL" and NULL, so they got all the tickets meant for them.

But it also often occurred that when a computer stored a license plate as NULL because they couldn't identify it and forwarded the ticket to a human operator, that said human operator not knowing about the difference between NULL and "NULL" only looked at the computer readout stating the license plate to be NULL instead of looking at the actual footage, and then manually assigned the ticket to our genius with the "NULL" license plate despite no other details of the cars matching, followed by them complaining to their colleagues how dumb their software is that it can't even do such a simple match.

So this "clever" person ended up with a bunch of wrongful tickets, and was allegedly ordered by the courts to change their license plate to something less confusing.

On the one hand I want to doubt this story because the computer directly displaying NULL to users not knowing about its possible meaning is just bad UI design, on the other hand it's government software and training so everything imaginable is possible.