I don't know anything about AOL specifically, but I've worked for a handful of BigCo's. All have required signing some sort of agreement at the start of employment which explicitly forbids leaking confidential information. So it's very likely that this person was under an NDA. What may be surprising to people who haven't worked at a BigCo is that due to legal implications, often times companies actually have guidelines about what should be discussed in recorded formats versus in person/phone.