Yeah but what fraction of home users are going to consider that prompt as opposed to just clicking on the OK button? I've noticed a lot of software will include that in its install steps.

You now actually need to specifically open the application with a right click to even have the option to open it, simply double clicking just says it's unsafe and closes. I think that safeguard probably has saved significant numbers of people from unsavory malware.

That's the very first option everyone turns off because it gets in the way.

It's the first option everyone you know turns off, but don't mistake anyone who even knows that Hacker News exists with a typical computer user.

Good point.