A boycott would only work if there were a concerted effort behind to spread the word as far as possible.

The recent Whole Foods boycott was a good example of how to do it - organizers used the forums section of the Whole Foods website to get the word out and Whole Foods didn't prevent it.

A couple of people changing hosts on HN is not going to amount to a hill of beans and would most likely just inconvenience those people since Godaddy is the cheapest option available (if you use their frequent coupon codes).