Interested. This is the first time I've seen a concept like this.

 When it comes to you killing players off, perhaps it could be a randomized fate? Similar to a spinning wheel in which you have numerous methods laid out and randomly choose. Or have them die in a character-specific way, that's determined throughout their gameplan or life (from the bio). Though I don't think in most cases the latter would be instantaneous.

 My pick, from the list, are the collars.