I'm glad that the Court of Appeal came out this way.
If you feel that someone's an unsafe driver -- perhaps due to their age, medical condition, or the like -- you're allowed to report that fact to the DMV. After contacting you and ascertaining the basis for your fears, the DMV may (or may not) ask the driver to provide a doctor's note certifying their medical ability to drive safely. And if the DMV's not happy with the doctor's note, they might ask the driver to retake a driver's test.
The DMV says that you're allowed to make these reports anonymously and that they'll try to keep these reports confidential "to the degree possible." Plaintiff here was one of those drivers, and sues to find out who initially ratted him out.
The Court of Appeal holds that there's no per se right to obtain the identity of the person who reported you to the DMV, and refuses to disclose that information here. That seems to me the correct approach to the various balancing factors.
I might highlight even more than Justice Robie does the need for anonymity here. Perhaps there's some risk of anonymous reporting out of spite or error or the like. But my sense is that a very large number of these anonymous reports come from family members; in particular, adult children who have ample reason to be seriously concerned about the risk of driving by one or more of their elderly parents -- to themselves as well as to the public. You're very rarely going to report your parent, even if it's entirely well founded, if you think it might come back to you.
I've personally seen several examples of children who were seriously, and for good reason, concerned about their parent's driving. Sometimes you can solve these things through persuasion, but a lot of times, you cannot. There's a fair degree of personal pride and freedom involved, after all. My grandmother, for example, lived in Alexandria (Virginia) and one night ended up randomly driving four hours in D.C., entirely lose, before ending up at a Denny's at 2:30 a.m. when a concerned waitress finally contacted my parents. Everyone knew she shouldn't drive, but she was insistent. Their solution was to pull the battery cables from her car and tell her that the car was "broken" and needed to be "fixed" -- a statement that was technically true, and served as a solution for the next year or two (as my grandmother's conception of time at that point was a fair piece off). But if the only solution had been to report her to the DMV, I'm confident that'd have been done. As long as it could be done anonymously.
Lots of families have stories like these. (My wife's aunt, for example, became an absolute terror on the roads during her final years.) The balancing test, in my view, comes out strongly in favor of anonymity.
(And, to be clear, I say this as a declaration of interest. I'm getting up there in age. If anyone in my family ever tries to stop me from driving, I'll be extraordinarily miffed. And out to get them.)