public nuisance

noun
  1. law an illegal act causing harm to members of a particular community rather than to any individual
  2. informal a person who is generally considered objectionable
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012