Deactivate Site

So, I'm putting together a WordPress Network. The goal is to be able to quickly deploy cheap websites for clients that aren't looking for all that much in their web presence. We'll just add a site, redirect their URL, throw on a pre-made theme, and let them do what they will. What I'm looking for is a way to deactivate their site automatically if they cancel their subscription. I know s2Member can use PayPal EOT to automagically demote members. Could it be set up to also deactivate an associated site? Or should I look elsewhere?