>I agree that mandatory developer registration feels too heavy handed, but I think the community needs a better response to this problem than "nuh uh, everything's fine as it is."

OK, so instead of educating stupid (or overly naive) people, we implement "protections" to limit any and all people to do useful things with their devices? And as a "side effect" force them to use "our" app store only? Something doesn't smell that good here …

How about a less drastic measure, like imposing a serious delay for "side loading" … let's say I'd to tell my phone that I want to install F-Droid and then would have to wait for some hours before the installation is possible? While using the device as usual, of course.

The count down could be combined with optional tutorials to teach people to contact their bank by phone meanwhile. Or whatever small printed tips might appear suitable.

How would that solve scammer-driven installs? The scammer is not in a rush, they already have the victim listening and following their instructions.