I've noticed that there are drivers who cannot be alone, even if they are the only one in their car. They can be on a divided highway with two lanes in the direction they are going, and only one other car in sight for half a mile, but they MUST drive right up and tailgate, or drive beside. They could pass the other car, they could drop back to the legal interval of one car length for every 10 miles of speed, but no. They must be WITH another car/driver. It's loony.
Yep, see that a lot. Bugs the hell out of me when they do it to me. Why do people risk their safety doing that? The farther you are from anyone else on the road, the better. Just stay away from me.