I've found that Badspot's policy for key deletion is to strict, specifically the use of a single key from multiple IPs. It's unfair to assume that someone is sharring a key because they used it at separate times in different places. There are plenty of explanations for such an occurence. For example: I've played Blockland on my friend's computer so I could show him how epic it was; Some people have laptops that they take to other places; Some people move when they go to college and then play Blockland on their old comp when they come home for the holidays. Just many different circumstances. More importantly, buying Blockland is no big deal since it's only a one time fee of $20. An example of someone who was victim to this circumstance is Beachbum. He used to live in the UK but moved to the US recently, so he hops around from IP to IP. I understand that he's not on the best of terms with Ephi or Badspot, but he hasn't done anything wrong interms of Blockland (not including the forums).
Feel free to give your input on this situation.