Well, if someone on slashdot says it can't be done, then that's enough for me...
Call it off, boys!
1) and 2) are related - describing how MAYBE he wants a Pepsi and maybe not, but only if he's sleepy, and following with comments on his sugar intake are unnecessary. Just say "have regular Pepsi available in case I would like some" and be done with it. Makes it much easier for those arranging the event to accommodate his requests.
As for 3), well that's the crux of the issue isn't it? It's clear RMS doesn't get how the rest of the world works.
how much due diligence should be expected?
How about "some", for starters. If I drop my wallet with only my dry cleaning receipt, but you know who I am and you know it's my wallet, you have an obligation to do more than just call the cleaners and ask whoever answers the phone there. Like, say, turning it into the police.
The moon is made of green cheese. -- John Heywood