I had an even worse issue (entirely my own fault) which highlights the dangers of building on another platform. My app (tweetbars.com) had a tiny flaw in that i

I had an even worse issue (entirely my own fault) which highlights the dangers of building on another platform. My app (tweetbars.com) had a tiny flaw in that it didn't time out the Curl calls to the Twitter API, and my host didn't kill hanging php executions. So when Twitter started hanging (and eventually timing out after a minute or so) the app basically ate one of their shared servers and the host took my whole account down for 24 hours.