BSOD as a service could actually be interesting, if you turn it around: a webservice to collect tracebacks and do interesting stuff with it, so that developers can quickly find bugs -- like Mozilla's feedback tool, but available to everyone.
In fact, I bet something like that is already available and I just don't know it.
I would rather see a Green Screen of Death as-a-service. It would take your video, or web cam, and fill the background with some scary or apocalyptic scene.
In fact, I bet something like that is already available and I just don't know it.