That's a very good question.

The Dan bot pumping out the hello world spam under a new npub each cycle is a good example. It's easy to block because it reuses the same text. What if it used a new npub each time with random text but flooded a hashtag or tagged a person to harass them? That gets tough to block.

Is it possible to flood nostr with bots so as to make it unusable?

Federated servers can block offending accounts, and federated servers can block another server that's not proactively blocking offensive accounts.

But, federated servers can also block or delete any account using their server that's saying things they don't personally like.

Which to me, just replaces one Elon, with a couple of dozen Elon's. Censorship by a committee.

Sooo, how long until we get a bot swarm attack on nostr?