A projectile going forward, sure.

It might bounce but at that point there's way less energy involved and the accident's intense enough that a welt on my head is the least of my problems.

When someone is flung from a car, I'm not really worried about the damage they will do.

And if you're in flinging territory, the cell phone is a rounding error compared to the windshield, and a lot more blunt too.

Physics!

Someone flung from a car won't damage you, but have a look at videos with crash test dummies, where a passenger in the back isn't wearing a seat belt. Them being flung in to the back of the driver's seat creates a huge impact.

The windshield won't be flung anywhere, but an electronic device will. Getting smashed in the face with an iPhone going 50Km/h is going to do some damage, rounded corners or not.

No. Don't do that here. Go back to reddit.

>that suction cup will not hold in the event of an accident and now your phone is a projectile.

I guess?

What do I do about the legally mandated 2-4lbs steel backed rear-view mirror that's required to be hand-removable without the use of tools in most places?

To be clear, i'm not saying you're wrong -- i'm saying that making a car a safe crash space will drive a person mad. It's practically impossible.

This. People underestimate the amount of force and damage small items can have in your car.