I was asked twice in two days:
Can't one person run for example 100,000 bitcoin nodes and overtake the #Bitcoin network and consensus rules with extra votes?

No. I'll explain...

Firstly, there is no "vote" in Bitcoin as such. It's a misleading word. People are confused because of the recent Taproot vote offered to miners. This was offered as a COURTESY, to avoid an ugly war (like in 2017), and avoiding nodes enforcing the issue (User Activated Soft Fork)

2nd, enforcing the rules is dependent on the economic power and number of individuals. It's not the number of nodes. Each individual can run a node to insist on the rules they will accept. More nodes for an individual does not increase his ability to resist rules they object to

If one person ran 100,000 nodes and ran a version of Bitcoin that increased the supply, for example, every other individual can resist that fork by running their own node.

When the other users, say a merchant, receive Bitcoin as payment, he can consider an invoice paid only if his version of the blockchain has a valid payment received.

If the payment was sent on one of the 100,000 alternative blockchains (nodes), but rejected by the merchant's node, the invoice is not considered paid.

So, an individual has enforced his own rules.

Bitcoin is the largest network of individuals that are enforcing the same rules.

If something is not clear, please ask.