[rorosaurus]

That's actually a really good idea! I would love to see this built-in to future router models after something widespread like this. It's fairly reasonable to force users to be physically present to update. Plus, you could force them to flip the switch back by not working until the write-enable line is disconnected again.

[Johnny555]

It could have the unintended side effect of making people even less likely to upgrade firmware.

[Scoundreller]

BIOS updates used to be like that. You would have to switch a jumper to do the update.

Then they got rid of that, even though most people that bothered with BIOS updates could be directed to switch a jumper around...