Having worked in a hotel/events, this 'informer' has seriously breached his NDA and as acted completely unprofessionally.
Yeah, and probably screwed his chances of ever holding an Apple dinner again - I bet they made some good $ on that one.
If it were for some great new product info, OK, he's a rumor-monger, but this is just a pointless thing to wreck your reputation over.
Dumbass.