I have no doubt that some clown doesn't want to watch you pick your nose or scratch your balls. If you read what you quoted, "certain actions initiated recordings for so many seconds prior to and after the event..." This is called CYA. There are enough idiots driving cars. Having a CDL assumes you can handle more responsibility and drive more responsibly.
That said, with todays electronic generation, I can get scared thinking about it. We fired a driver (younger guy) because he would actually post crap on his facebook page while HE WAS DRIVING. Also fired a driver (again, younger guy and when I say younger, mid 30's or so) AFTER he spent 6 months in the hospital because it was determined that he was texting while driving.
Worst case, most companies are at least going to GPS for truck location (added the fact that you can see how fast they are driving).