I think that the Armagh (Ard Mhacha) disaster of 1889 was caused by a train without brakes. Internet anonymity seems to have a similar effect on people, and social inhibitions get loosened, a bit like alcohol. Which is one reason I use my own real name.

We had an incident at the New Year party, when a guest accosted another, and accused her of bewitching his girlfriend of the previous year (they hadn't met inbetween) and causing her to leave him. We eventually restrained him, gently led him away, and put him on a whisky drip until he was sedated.

The answer is simply to ignore it, and if you feel your differences are irreconcilable, don't talk to each other.