No, but it sure hurts when a hubber stops following me. Therefore I wouldn't do that to another hubber. It would take something genuinely Earth-shattering for me to actually stop following a hubber.
You know what that's like? If you've ever bought a 99 cent bag of Doritos, and you look on the back and you see a little blurb that says something like: 'We at Doritos Food Brands Corn Chips stand behind the tasty wholesome fresh goodness of our products. So if a bag is unsatisfactory, just send us a postcard to x address and we'll send you your money back!'
I would not send away for a refund for a 99 cent bag of Doritos. Times are not that hard yet!