Where I work most of our faxing are done through a fax-server where you just print or email the document you want to fax and the server send it out, without a single sheet of paper involved. But we still have a number of old fashioned fax machines in use, since not everything is generated electronically (e.g. waybills, photocopies of cheques, etc). These fax machines uses regular plain phone lines that are not part of our central phone system, and so do not require the user to dial "9" first to get an external line. All these machines have a label on it printed in large letters "Do Not Dial 9 First".
One day reception called me up and says there are a couple of police officers here in response to a 911 call, and she gave me a phone number that the police says the call was originated from. So I looked up the number in our database, and sure enough it was used by one of the fax machines. I went down to the department where the machine is, and there right on the top of the output tray of the fax machine is a fax failure notice – it prints one out whenever a fax was not able to complete for whatever reason. And right on the notice is the number it tried to call.
Apparently someone tried to fax to a location with an area code that begins with "1" (we are just outside of Toronto, area code 905), and the idiot punched in "9" first, then a "1" for an out of area call, then the rest of the number. Therefore the resulting string of numbers is "9-1-1xx-xxx-xxxx".
So I brought the pair of officers over to where the machine is, showed them the fax failure notice with the number it tried to dial, even showed them the label on the machine that reminds people not to dial 9. Thankfully they too found it amusing and let the matter drop, since this is the first time such an incident occurred.
Of course, afterwards I had to notify several people of the incident – the supervisor of that department so that he can have a chat with his entire team, the building manager since the police was involved, and the HR manager to send out an "All-Recipient" email reminding the mass not to dial 9.
And just to be sure I printed out more "do not dial 9" labels with larger fonts and stick them on all the fax machines, on a spot even closer to the number keys than the existing labels. Which is not an easy thing to do as there aren't much large empty flat spots on the machine close to the number keys to begin with.