I see RID (radio's Logical ID Number) of 1 quite often. The radio personality file (Moto calls it a codeplug) is written with a default user Logical ID number (LID) of 1. Whoever programs the radio is supposed to change the ID number of each individual radio to be a unique number. But, if the (non-technical) personal programming the radio doesn't know to do this, all the radios end-up with the same ID number, especially on conventional channels. This happens when a Radio Technician (who knows better !) is either lazy or simply doesn't give a damn.
On a lighter note:
If you scan the AGA (All Government Agencies) simplex frequencies, you will often see radios being used for car-to-car intercom passing though your area, where all the radios transmit an ID of 1. Especially on the Interstates. Can be very amusing listening at times, especially since they 'assume' that nobody can hear them! A heck of a lot more fun at times than listening to FRS channels while going down the highway.