Oh, your kids are grown, by your reaction I took you as a helicopter mom with a 16 year old son that just hit the streets. Maybe the helicopter mom syndrome never goes away?
The latter statement is not silly though, letting your kid get in a car is the worst possible thing you could do from a safety perspective, it sounds silly because only we view cars as a nessisty. Texting and drive is not I good idea, I belive I've expressed that, but your outrage is overblown. You probably do something far worse behind the wheel all the time.