"I want to take this opportunity to welcome you to what will inevitably be a lot of fun, but also provide a cautionary. We take secrecy very serious at BR."
That's either fake, or an idiot wrote it and forged Abrams' signature. Also, the idea that Abrams would threaten to personally destroy anyone's reputation in a form letter like that is absurd. Sure, he or others might try to do that to people, but that part is either a joke, or again, fake.
I'm going with fake.