User blog comment:SalemtheCruel/A little night music/@comment-4094509-20111017223621/@comment-3148757-20111017223918

It says 'Don't tread on me' to symbolize that the Bloodfangs don't want to be 'tread on' by their foolish leader Cassava any longer. It is based off the Gadsden flag used by the Americans during the Revolutionary War :)