They could create a million nodes, it would make no difference. You are wasting your own time with these questions.
why? i thought changes on the protocoll are voted by full nodes? am i wrong?
You are wrong.
Full nodes ENFORCE the protocol rules, but there is no voting.
If you run a billion nodes that all enforce different rules, then your nodes will fork their own blockchain with those other rules. Meanwhile, those of us running nodes with the current protocol rules will all happily ignore your nodes and continue with our own blockchain with our rules.