Why do you say that?
I've been into racing for a long time and that is one of the things we drill into the newbies. Keep your cars cleaned out. Not only is it dangerous if you get into a wreck, it's distracting when you're driving.
There's nothing anal about a simple thing you can do to be safer on the road. Less distractions = more alertness available to do what you're supposed to be doing -- driving. When you get behind the wheel of a car, you're not only responsible for yourself and your passengers, you're responsible for the well-being of others around you and in your path. Too many people don't realize that they have a responsibility when they're in a car to control it in such a way that they aren't endangering others and they disregard that responsibility by talking on a phone, swatting at the kids in the back seat, eating their breakfast/lunch, sipping their coffee, putting on makeup, reading the newspaper, etc, etc...
Ricky