There is a simple reason why I think it is a fake, and that is because the top 50 shareholders was released on the 29th April. The poster later then 'revealed' himself on the 30th (and his 5 million shares... Actually, just under).
To initially post for the first time on the 28th with that name and then top 50 come out and then reveal is very curious nonetheless.
Either way, ignoring the identity of the poster, the post makes sense what has been happening IMO. It made me remember Rob Telson and how he was such a great asset from ARM and his hard work and energy with our company. His leaving was not really addressed properly I thought, and gave me a bad feeling at the time where BRN was heading. Speculating, I think he and Sean clashed. Since then, more red flags have been waved than good news flow on the whole.