This suggestion seems to have evolved.
Per CJ's posts, this seems to be at least a partial implementation for email notifications. I know that email notifications occur as I receive them when someone sends me a PM when I'm not online. It seems that CJ intended to include hostile voodoo as an email notification at some point, but I don't know if that is implemented, nor do I believe it should.
As to the basis of the original suggestion, phone (SMS) notifications, I would disapprove.
I would like to know the extent of all email notifications that have been implement, as that may give credence to where we move this suggestion.