I never expected my thread to come back from the dead like this.
1. I don't see anyway possible that my "shadow" was drafting. Given the length of our tow bar and the toad on it, any benefit from reduced airflow was negligible at best. I won't speculate how much of the time the following driver was actually a safe following distance behind me. There were definitely times when he wasn't.
2. I really did contemplate calling 911 several times, especially when the follower changed lanes on the truck lane on a hill to stay behind me. That one really weirded me out. What I could not mentally get past was my anticipated conversation with the dispatcher.
Dispatcher: What is your emergency?
Me: I'm in an RV southbound on I-81 at mile marker xxx and there is a car following me.
Dispatcher: Can you describe the car?
Me: Not very well - it is following me. (Later, when it passed, I did get a good look at it but that was 100 miles after the following started.).
Dispatcher: Is the driver of the car doing anything unusual?
Me: No, he is just following me and has been doing it for over 50 miles.
Dispatcher: Did you do anything to irritate him or make him mad?
Me: Not that I know about. I've just been driving in the right lane. I haven't passed anyone.
Dispatcher: Why do you think that his following you is a problem?
Me: Because he has been doing it a long time and has had many opportunities to pass. In fact, he switched lanes on the hill when I moved over to the truck lane in order to stay behind me.
Dispatcher: Have you every had this problem before?
... and the conversation might go down hill from there.
I do realize that dispatchers get all kinds of calls from kooky people because our daughter is a 911 dispatcher. In an out of State situation, however, I was concerned that they might pull me over and detain me (no one wants a lunatic or a meth head behind the wheel of an RV on an Interstate). I thought about having my wife make the call but she couldn't have answered the questions as correctly as I could and it might have sounded even worse coming from her.
The good news is that nothing has ever come of it. I was worried for a while that I might have had an undetected fender-bender with them and they were just waiting for me to stop and that I would get something in the mail after they ran my license plate number. Fortunately, nothing like that happened and I'd put the whole incident in my rear view mirror until I saw the thread was active again.