Also, you probably don't want them to. I've got a huge problem with software that goes out of its way to prevent the user from doing something they explicitly want to do.
How is code supposed to determine user intent? The AVG developers would no doubt say the user intended to install their software and didn't want to have to learn all of the details, just like every other malware / adware vendor claims; the Chrome developers would say that users want to be secure but if you ask, millions of people will be insecure because they made a mistake or were encouraged to believe something was safer than it actually is.
There simply isn't a simple solution to this problem.
> I've got a huge problem with software that goes out of its way to prevent the user from doing something they explicitly want to do.
I guess you have a huge problem with Windows 7 or later or OS X 10.9 or later, which really go out of their way to prevent you from loading unsigned kernel-space device drivers.