Very good suggestion! I've witnessed a lot of situations like this and it typically involved new players who didn't really get the grip of ssrp yet. Here is how it should be implemented in my opinion:
As soon as a player attempts to switch to a police job they should be prompted with a dialog similar to the election fee dialog when switching to mayor (At work right now so I can't really add screenshots). The dialog should warn the player that they have a certain amount of printers placed down somewhere on the map and that if they proceed to switch to a police job, all printers get destroyed automatically. If the player decides to proceed, all printer will be destroyed as mentioned in the dialog. If they player decides to remain in their current job, nothing happens.
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