Yesterday, my phone suddenly started downloading something called “Facebook build (somethingorother).” It didn’t show any progress, wouldn’t go away, and I worried that maybe it was a piece of malware or something buggy. A quick search turned up nothing. A later search found other people asking what this was. Late last night, there were articles about “Hey, why is Facebook updating itself!”

It turns out that yes, Facebook is now downloading its own updates on Android phones and tablets instead of just pushing them out through the relevant app stores (Google Play and Amazon, mainly). I’m sure they thought it was a great idea — web browsers like Firefox and Chrome have been doing this for several years on the desktop.

The problem is that it violates expectations of what the app will do, and where your software is coming from.

Imagine your car’s manufacturer issues a recall. Now imagine three scenarios:

Scenario 1: You receive a notice of the recall, asking you to make an appointment to bring the car in for maintenance. (For those of you who don’t drive, this is how it normally works.)

Scenario 2: You receive a notice offering to send a technician out to do the repairs at your home or workplace. (This would be awesome, but impractical.)

Scenario 3: You’re sitting in the living room when you hear a noise from the garage. You go out to investigate and find someone messing with your car.

That’s what this feels like.

It’s one thing to offer software through third-party channels. The fact that it’s possible is one of the reasons I prefer Android to iOS. In that case, notifying me of updates, maybe even simplifying the download would be very convenient — if I know ahead of time that it’s going to happen. And if they’re not switching channels on me. A download coming from some new location, but claiming to be a familiar piece of software, and a notice telling you to install it? That’s how trojans work.

In short, it’s a violation of trust…and if there’s one thing we’ve learned about Facebook over the last few years, it’s that the social network has enough problems with trust.

Imagine that a group of people who don’t drive much, don’t understand how cars work under the hood, and have never studied traffic engineering decide that they’re going to stop speeding by requiring that cars automatically slam on the emergency brake and lock the controls the moment they exceed the speed limit — or the moment someone reports that the car has exceeded the speed limit.

Note that I didn’t say anything about turning the engine off, or putting it in neutral. Or only doing so in places where the speed limit is properly posted. Or worrying about whether there’s a car behind them that will have to slam on their own breaks to prevent a pile-up. Or actually checking that the car really is speeding before acting on the report.

Now imagine that criticisms and objections raised by actual drivers, the auto industry, traffic engineers, highway planners, and city planners are all dismissed as speeder propaganda.

That’s basically what’s going on with the “anti-piracy” bills being discussed in the House (SOPA) and Senate (PIPA/Protect IP).

So Apple is ticked off at Real’s reverse-engineering to let people buy music from Real and play it on an iPod. Apple has threatened DMCA sanctions and all but promised to deliberately break it in the next software update.

Excuse me? In general I like Apple, but their insistence on locking the iPod to iTunes and iTunes alone is short-sighted. When people hacked up a way to use an iPod on Windows, they first licensed the software, then wrote iTunes for Windows. iPod sales have tripled to the point where they may soon outsell Macintoshes. This could never have happened if Apple had kept the iPod Mac-specific.

I’m reminded of the many times Microsoft has altered its file-sharing protocol to break compatibility with Samba, the package that allows Linux, BSD, and now Mac OS X to connect to Windows networks.

The classic analogy is getting a car that can only run on certain roads. So someone’s found a way to let the iPod drive some different roads. But Apple still sells as many iPods. They might even sell more (as when it gained Windows compatibility). Why the accusations of hacking, why the legal threats, and why the determination to keep the iPod locked to their own roads?