I'm not Max or Greg, but I think I know what causes the confusion. The Extropian principals and the Libertarian ones are not dis-similar, and in many ways are complementary. Because of this many Extropians are also Libertarians and they speak up on this list to promote their Libertarian principals. The Non-libertarian Extropians [I do hope I'm spelling everything correctly, because I'm a horrible speller] do sometimes speak out against the Libertarians. [See the debate between Terry and Robert.]
So while this is NOT a Libertarian forum it can be seen as such because of a high porportion of vocal Libertarians.
Mob rule isn't any prettier merely because the mob calls itself a government.