He doesn't sound grumpy to me...he sounds exhausted & exasperated. He's given a lot over the years, still signs tons of stuff when he's out on tour (which he also still does pretty often), and I think he deserves his space after all these years.
Who knows what's going on in his life? How about some gratitude for all he's given, and still gives (he could just retire you know? He is 68- most folks already have at that age) as opposed to indignation over a pretty reasonable request? I think it was uncomfortable for him to do, and that showed a bit, but if he needs to set boundaries, I think that's fine. He also makes a point, amidst the exhaustion & exasperation, to note that this is sent out with "peace & love" folks.
The Beatles gave & still give a lot. They are human, not the property of ever demanding Beatle fans/fanatics. Blessings!
Om Namah Shivaya !!!!