I can top that one. After work one day I headed down to look at an implement 140 miles away... then I had to drive home again. Going down the interstate (speed limit 75) I got behind 2 beer vendor trucks travelling side by side at 45 mph, with a line of cars building up behind them. We travelled over 14 miles that way and people were not impressed. After watching 1 motorist pass them in the breakdown lane I got on the CB and warned them that I had taken their truck numbers and would be filing a complaint.
They didn't reply (probably didn't have radios in their truck) but I did have a conversation with an unhappy trucker. Finally we came to a construction site with a one lane bridge... before they could double up again somebody got beside them and then the rest of us followed.
I did write a letter of complaint to the company giving them the details as well as truck numbers, time, and mile markers on the interstate so that they would know it wasn't just a crank complaint. They wrote me back stating they would look into it but I doubt that anything ever happened.