That creates an active incentive to physically lean on people to roll up networks.
cjdns works by requiring people to exchange keys with someone out of band to get access to their mesh, and to me that just seems as fundamentally defeating the purpose.
Yes, that means you need to build a system where bad guys are hard to impossible to track down and throw off the mesh. The problem is if you create a system where misbehaving people are trackable, then good guys can be tracked too.
should be based in social connections and trust.. the old school policy