Noun : They sold the demonstrator at half price.    From Dictionary.com. 

As Battle Cry organizers walked through the crowd of young people telling them, "Don't engage with them," one rain-soaked counterdemonstrator yelled, "And next time, come back in summer.".    From Wordnik.com.  [be afraid] Reference

A counterdemonstrator across the street held a "Support Our Troops" sign.    From Wordnik.com.  [The Orange County Register - News Headlines : Top Stories] Reference