Lion, you are also correct. It would be next to impossible to gather those statistics because most recovery communities operate under anonymity.
I'm sure it has happened. I used to have those same thoughts. Probably don't hear about it because no one tells or comes back around to talk about it.
For ME, however, hoping that this next to nothing possibility to happen is ridiculous. I can't continue doing damage to myself and everything around me jus for that small chance. There is honestly too much at stake. Mainly happiness and serenity.