Mark Schlereth on his ESPN radio show was talking about dumb things said on SB media days and he brought up Super Bowl XXVI when he was with Washington. He said one of the Bills defensive coaches (Dickerson?) was making fun of the Hogs (Washington O-Line) and when Joe Gibbs heard about it he became very angry, told the team about it and wanted them to murder the Bills.
From my memory, the Bills lost that Super Bowl because their DBs couldn't cover the Smurfs but still, unnecessary bulletin board material was provided by a Bills' coach that pissed off their opponents.