Civil Disobedience ? What no strikes and picket lines?

Someone, probably the union SEIU, is organizing demonstrations outside fast food restaurants, and managing to get some of the demonstrators arrested.  Used to be, when labor wanted something they called a strike to shut down the business, and threw up a picket line to discourage customers, scabs, delivery men, just about anyone, from entering the premises.  It was effective, management would capitulate quickly.  I wonder why SEIU isn't doing that to McDonalds?
   Could it be that McDonalds workers don't want to go on strike?  or walk a picket line?  I wonder how many of the demonstrators are real McDonald's employees?  Or are they all  SEIU goons?