Nope.  People understand that GLBSE is most likely really a general partnership, which means that its "shareholders" are actually ordinary partners and therefore jointly and severally liable.  It would be different if GLBSE was an actual company or an actual limited liability partnership, but everything that's been posted indicates that it's not and therefore the protections which would be available to shareholders/investors (from what you've said the role the "shareholders" played was more like that of investors in a limited liability partnership than that of shareholders in a private company) aren't available to you.