Yep, they do that all the time. The Collings Forum closed down a few months ago. Someone is starting a new Collings Forum at this LINK and announced it on AGF. They wiped the post that made the announcement and all subsequent mentions of the new Collings Forum. Froggy Bottom runs a raffle each year for a charitable cause, like health care for musicians, and whenever it is announced on AGF, it gets deleted. Weird behavior me thinks.