I think this may be what got SLP tombstoned, the "heh-heh" he posted after he repeated "DU poisoning". He probably wouldn't have lasted much longer anyway, but this was the only thing I could see that looked overtly suspicious (other than his obvious intelligence).
His obvious intelligence may have been the problem. Way too many folks (and virtually all liberals) think the military is full of idiots. That prejudice is applied double against the Marine Corps.
That is to say, they probably thought he wasn't a real marine because he's so smart. Freakin idiots.