I used to work for Almex Control Systems who made bus to ket machines.
One of the problems we had was bus drivers who would push coins into the machine through gaps near the ticket printer.
This would short out something in the machine, allowing them to switch to hand written tickets which made it much easier to steal from the bus company.
I was always pleased that they used £1 coins and not, for example, paperclips.
Cool stuff. I worked with wayfarer kit. Absolutely indestructible by bus drivers by design. Right bunch of sods though bus drivers are. The worst class of "user" I've ever had to deal with.
One of the problems we had was bus drivers who would push coins into the machine through gaps near the ticket printer.
This would short out something in the machine, allowing them to switch to hand written tickets which made it much easier to steal from the bus company.
I was always pleased that they used £1 coins and not, for example, paperclips.