picketer

noun

1. Someone who pickets; one participating in a demonstration or posted on a picket line.

   “At the first show at U.C.L.A., picketers ended up joining the ticket line to see what the play was about.”

   “While hourly workers ponder the agreement, salaried workers at G.M., many of whom encountered picketers blocking plant entrances when they arrived for work on Monday and Tuesday, said they, too, were thankful the strike did not drag on, because there was no upside for them.”