Sabots - toss your shoes into the machine works * sabotage: During the Industrial Revolution, machines replaced workers at an alarming rate throughout Europe, and the once stable economy of Guild and craft shop members who had performed manual labor for generations found their very welfare threatened. To protest machine replacement of workers, the workers would toss their shoes into the machine works to make them stop - sabotage.
Anne Feeney, the 'Union Maid' shows this principal at work in a poster with a wrench tossed into the gears. And, of course, she sings Joe Hill's songs . . .