Lini on Nostr: good point. i am not a IT guy, but is it realy that simple to exclude the blocks a ...

good point.
i am not a IT guy, but is it realy that simple to exclude the blocks a bad actor makes ? thousands of nodes must exclude the block at the same time.how would i do that on my own node ?
maby i am stuck in a wrong thought.
do you have any longer videos ore text about that ? i would like to learn more about that topic, because thats my biggest worry right now.