“The lumpenproletariat, this scum of the decaying elements of all classes, which establishes headquarters in all the big cities, is the worst of all possible allies. It is an absolutely venal, an absolutely brazen crew. If the French workers, in the course of the Revolution, inscribed on the houses: Mort aux voleurs! (Death to the thieves!) and even shot down many, they did it, not out of enthusiasm for property, but because they rightly considered it necessary to hold that band at arm’s length. Every leader of the workers who utilises these gutter-proletarians as guards or supports, proves himself by this action alone a traitor to the movement.”
– Friedrich Engels, “The Peasant War in Germany”