You make a good point. I do want to point out that typically Google gives plenty of notice, and gives users the option of downloading and backing up whatever data they had stored on their service before pulling the plug. Even now, you can still head to Reader and download your personal data and whatnot, up to 15 days after they turn it off.

I don't like it either, but it's not the same as them just deleting your data suddenly, which you seem to be alluding to.