I posted that vid here a couple weeks ago.
Down here in 'Bama I think it would be considered more like jug fishin', which would make it legal for non-gamefish like Catfish, Carp, and Gar... but not for gamefish. You could have a fleet of them if you wanted.
They are trying to outlaw them in some states, because they're using them in the Tailrace waters of some dams that don't allow boats with people in them to take their lines way out further than one could cast. They want to outlaw them because they're very effective and some people are taking the big spawners with them.