Do you really base all of your friendships on whether or not someone does what they want in their car while they drive so you don't have to?
Driving has little to do with it (and personally, I like to drive, so it's not like someone's doing me some awesome favor by driving). It's more about whether they respect my opinion and want me to feel comfortable and safe. My best friend likes to play crap like Quiet Riot at 90 decibels and sing along. It's a little annoying, but I've never said a word in complaint because it doesn't affect my safety and she pays attention to her driving.
I also don't get why, when someone has other people in the car, they'd need to text someone else to keep themselves entertained. Why not just talk to the people in the car? Seems pretty weird to me.