I told the missus about the nutter who stopped his car to have a go at me - at the time I thought there was a real chance of him trying for seconds, and I didn't want him to get away with it if I wasn't there to tell the tale.
Otherwise I tend to limit it to saying "Oh, just close overtakes, the usual". I do try to note the regs of usual suspects, again, just in case I'm not there to tell the tale.