Let me preface this with I am not a lawyer and I don't play one on TV. It is possible to go after the corp partners. The LLC does not protect you in case of fraud. Since Righthaven did not own the copyrights and filed suit anyway. This caused the defendant to have to defend himself to fraudulent accusations. If it can be shown that Righthaven knew or should have known that they had no standing to bring suit then the hurdle to pierce the corp veil is low. I think that that since the judge has ruled against Righthaven at every turn that a ruling to pierce the LLC and allow the partners to be held liable would not be a hard case to make.