Honest nodes reject dishonest nodes EMU creation.
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EMU's HAVE to be distrubuted according to set of rules, which can be checked against the ledger by ANY node in the system.
So what are those rules exactly? It's easy to imagine a network of two nodes, one honest and another pretending to be a 999 nodes network. Whatever the rules are, from the point of view of the honest node it would seem okay that it gets 0.1% of the EMUs issued, because it thinks that it's one of 1000 nodes network. While in fact it should get 50%.