Comment by Zak

There's already a restriction that requires going into the settings and flipping a toggle, with a warning. I think that's enough.

To be clear, enough does not mean that will stop every trojan/scam. People send Starbucks gift cards to callers claiming to be from the IRS calling to collect overdue taxes despite the obvious absurdity. Enough means that someone who doesn't know anything about computers but who reads and believes the warning label has sufficient information to know that it's a potentially dangerous decision. Some people will make the dangerous decision anyway, but it's on them at that point.