In this area we have a big problem with tailgaters period. But when they tailgate us when we are on the bikes we run into another problem. See my son's thread ( Friend killed on bike) The last 3 years I have been confronting the tailgaters nicely when I have the opportunity and nicely telling them the problems involved when they tailgate a bike. Don't know if it helps,but some do say they are sorry and didn't realize. Once in a while it turns into a confrontation,but oh well, they need to be told.
What do some of you do? I thought about ball bearings,etc--but I'm more afraid of causing an accident and getting someone not involved hurt. I'm talking about the problem tailgaters where slowing down,waving them around,etc don't help.