Hey thanks for the downvote! I'm guessing it's because of the use of "mafia".
Here is the rule for truck drivers listening to the radio in their truck: they have to pay extra copyright fee because they are listening in their work environment, and therefore the normal copyright that radio is already paying is not enough.
Not as much as you probably think it does. Most of the important legal cases about filesharing/P2P systems and contributory infringement have hinged on whether the service operators had actual knowledge of infringement by their users, not merely a reasonable suspicion that their users expected to be able to use the software for infringement.