The definition is relative. A “cyclist” in the classical definition of the word is a person whose favorite pastime is riding a bicycle. A thug or group of thugs attacking people or damaging property while riding bicycles are not “cyclists,” they are simply thugs who were riding bicycles. We don’t call muggers who knock you down and steal your wallet pedestrians or fighters, we call them muggers. And we don’t all those armed Latin American armed robbers on motorcycles motorcyclists, we call them armed robbers. But the term “cyclist” has negative connotations in places where bicycle riders are frequently aggressive.