The reason LLCs put LLC after their names is to inform principals choosing to enter contract with them that they are protected by liability limitations. If I choose to buy a fridge from an LLC and it goes BK after taking my money I know that I have a low chance of getting my money back. And I knew that when I chose to give them my money.
Righthaven went after people without giving them any choice. The sued parties never had an option of "shall I be sued by an LLC or another sort of company". I think the limitation of liability may not apply here.
(Certainly I think it should not apply but that's just me.)