Explicit chains of trust where, if a bad actor is accepted into the network, not only are they expelled but also whoever let them into the network is expelled too.
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@dx
Yeah, something like that seems a good idea, though I'd make it more gentle. It can easily get too trigger happy with expulsions. Maybe the bad actor started out OK then changed. Or maybe the person who brought them in trusted them for "good enough" reason, but was wrong.
A gentler approach, after expelling the bad actor, might put the whole chain (the one who brought in the bad actor, the one who brought that one in, etc) on a warning list. Then leave it to human judgment. 🤷♂️
