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Yeah I love the idea of this kind of robust mesh. I think it'll happen eventually. Alternatively it could propagate until it reaches whoever it's going to on the limited network (your friend in a different neighborhood) and then send out a kill order for the other propagating packets.

The kill order sounds like it could waste as much bandwidth as the duplicated message copies, and be exploitable to suppress messages unless it requires a signature from the message's recipient.

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