Better yet, let the user pick a confirmation word (kinda like a 'safe word'), or choose one at random from a list of moderately complex but well known words tha

Better yet, let the user pick a confirmation word (kinda like a 'safe word'), or choose one at random from a list of moderately complex but well known words that are unlikely to be uttered in casual conversation. To send this message to John Smith, say 'artichoke'.