Whether I'm in the car or on the bike, if someone tailgates me I beckon 'em to come closer! It's amazing how often the fall right back.
Doesn't usually work with BMW drivers though 'cause they're usually too thick to get it .. or anything come to think!
If they're still there, and when it's safe, I pull over - at least if they're in front, I can keep an eye on 'em! Obviously give 'em the finger as they pass - goes without saying.
