Sentence:  The band's leader, Joe “Shithead” Keithley, shows no signs of slowing down. . . . He's still an unapologetic <WSD>shit-disturber</WSD>, but it's evident that the veteran antiauthoritarian is turning into something akin to (gasp!) a respected authority figure. 
Meaning of the word marked with <WSD> tags:  A person who voices or encourages a viewpoint opposed to the status quo; an iconoclast.