That part. Anyone complaining about an insider who says they know something, but then doesn't tell when pressed, fails to realize there's certain things said insider can and cannot say. It's not like they're playing games.
First-hand knowledge, in this case, if you haven't already figured, would mean the insider is directly involved in some branch of the Disney Parks. I think there are things they CAN say if its information they aren't required to withhold, thus why insiders sometimes mention something they know about, in this case, the upcoming Villains area at Magic Kingdom, but don't mention anything else even when others press them. If an insider tells us something they're not supposed to, that puts their job at risk.