How about cops?
They’ve recently made it illegal (here) to text while driving. Granted, there’s no rocket science involved in figuring out that watching a tiny screen while typing a message at 70MPH isn’t the brightest thing you can do for that day. Yet, I still see it all the time. Worst case I saw was a young girl in the left lane, slowing to ~50 while texting a message, then speeding up to ~80 when she was done. This cycle kept going over and over. They blame texting (and other lack of attention activities) on a lot of accidents, and yet the cops do nothing to enforce that law. If you’re in a school zone, watch out…otherwise, no problem.