Towing experts?

It's sad to say, but there are some (not all) truck drivers who delight in blowing by a tag along camper as close as they can get, just to make it sway. I used to see them try it all the time when I was dragging our Sunnybrook 5th wheel up and down the road. A friend of mine who tows a tag along camper says he automatically reaches for the trailer brake lever when he see's a tractor trailer getting ready to do a fly by on him.