Moreover, who says that the FBI or some other agency will stop after this iPhone, or the next 12 iPhones. Why not push to get their own signing key after they succeed in this case? They will try to get as far as possible.
We live in 2016. many of our devices with our private data are directly addressable from anywhere in the world. Intentionally weakening encryption and security in any way is a dangerous proposition.
It's good that Apple fights this tooth and nail. Sure, it may align up with their PR. I don't care, it benefits every citizen of the net who wants privacy and security.
This is the very essence of why a slippery slope is often a logical fallacy, because one does not necessarily follow from the other, and no supporting evidence is given that it would.
There are plenty of things that would keep this step from occurring, primary among them that there would be no legal justification - in the context of the All Writs Act, there would already be a solution available to law enforcement that was less burdensome to Apple than providing the keys to the kingdom.
I, too, think it is laudable that Apple would fight for privacy, but I also think that a lot of the argumentation around this case is soft and ideological.
Basically, this project, from whatever angle it is approached, has a non-zero chance of backfiring dramatically thus risking the security and privacy of millions of iPhone users throughout the world.
I'm still opposed to this, though... The FBI wants to be able to dictate to a private company what features to build (because of the All Writs Act).
Let's face it, the fact that Apple can be compeled to create this bypass is a civil rights issue, but the fact that it can create it at all is already a security bug. One that, in their defense, they seem to be trying to patch a step at a time in newer versions of their devices.
Or if each unlock cost the requester a $10 billion fee (donated to charity)? To make them think harder about when to use an unlock.
This is where it will end, and perhaps rightly so. There is no physical space in the US where US citizens can hide from the FBI and other authorities. Why should there be a virtual space where US citizens can hide. US citizens are not free to hide from the authorities and the law.
"Why should there be a virtual space where people can hide from US/China/Russia/Saudi Arabia/etc."
I see no 'rightly' in this, at all. The end-game is an abject panopticon that makes the Stasi look like amateurs.
(Regardless of what Google, etc. may collect, corporations do not have guns or the ability to put you in jail. Not yet, anyway).