@andreawes and @thebuttonwoodproject: I have contacted you both at the email addresses on your accounts with information regarding your followers.
@jobrodie To dramatically reduce, and prevent spam followers we take several measures. Before someone is allowed to follow your blog via email we run them through our spam fighting filter Akismet.
For users who choose to have the My Community Widget we only show followers who have interacted with the site. This prevents the spam bots from getting public links on the user's site.