The "holograph" guys, the ones that say it was a missile hitting the pentagon, not a plane -- I think they're plants. They aren't legit. Basically they are agents provacateur types --
a·gent pro·vo·ca·teur (-zhä prô-vôkä-tr)
n. pl. a·gents pro·vo·ca·teurs (-zhä prô-vôkä-tr)
A person employed to associate with suspected individuals or groups with the purpose of inciting them to commit acts that will make them liable to punishment.
Along those lines, you have a CIA plant joining the 9/11 truth movement, goes along with everything else, but pushes the extreme. There weren't real planes! It was missiles. People reading that are a little undecided read it and discredit the whole thing.