That's why the picketers you see outside your store are coming from another store and another neighborhood. They are not the employees of that particular store where they are picketing.
That's not true in the case of the Ralph's by my house. I spent 15 minutes talking to picketers...employees I know from shopping there...including April...a woman I know from the neighborhood. Since they've stopped picketing at Ralph's these people I know have moved to Albertson's...so I now shop there.