Sounds like a great idea! we were talking about such when setting up npcs last night. but in a more convoluted manner. Such as an npc would have an RNG text of 5% so when he'd speak his line the other npcs would trigger a response from that line of text. Don't think that may be possible here in this case but as you' plan to do it, it may work, (aslong we're given a long time span to work with and not just max 1min)