Good call. Internet was plain and unencrypted when the takeover happened. #Bitcoin is born with encryption that keeps it away of the praying reach and guarded by the nodes. Yes everyone that cares must run at least 2 nodes - one for tinkering and another for doing the job itself. Think of a miner as one of the competing accountants for the next report compilation ( block) scrutinized for compliance by thousands of nodes and other miners. If they're caught in intentional or accidental error or outpaced from competitors, they loose their efforts for nothing...