Feature Request: More Custom PINs Please

Dear developers, is there any way you could add capability for more custom PINs? My wife and son and I use three of the four currently allowed. This leaves only one, which has to be shared among everyone else who needs access to the house.

But doesn't this make logging kind of pointless? You know, let's say my brother, the cleaning service, the bathroom tile guy who comes and goes, and two drywall guys we used four years ago all share a custom PIN called "Other." How do I tell who disarmed the system at 10:16 AM? The log just says Other.

The only workaround I could think of was to keep changing the shared PIN and then making everyone who uses it memorize a new one. Or does anyone have any suggestions?