Not an expert, but I am pretty sure that the idea to make non-paid, voluntary work that is inspired by a sense of community illegal to strengthen some 21. century understanding of workers rights is the straight up opposite of a Marxist utopia.

I think the key is

> There is no "signing up" when the deal is both illegal and unfair.

If behaviour does conflict with lawyers or philosophers opinion, individual autonomy is to be stripped. (Therefore no agreeing, signing up, etc.) If those people disagree, people are just exploited socketpuppets for a political agenda. Maybe that's Marxist cynicism.