He's been in the spotlight for more that forty years and seen how fananitcal fans can be. You can't blame him for not answering his fan mail. We all know what happened to John Lennon and the nutcase who stabbed George Harrison. It doesn't sound like grumpiness, but maybe Ringo would like to shut it down.
What is he smoking?
I think the drugs have fried his brain.
Who says Peace love anymore.
If he has time to make a home video why hasn't he got time to open and reply his two fan letters every week?