That's confusing because I thought you just said you support censorship and I have no idea what you're talking about; Google searches come up pretty blank as well. It looks like their might be some header exploits that can crash nodes using fake blocks but that's certainly not what we are discussing.

https://medium.com/fcats-blockchain-incubator/understanding-the-bitcoin-blockchain-header-a2b0db06b515

This explanation of the header says it's 80 bytes which seems to imply that spamming with the header alone is quite impossible. It would be the junk data in the fake orphaned block that's spamming the network with garbage, which again is not the issue here.

To deny there is spam is pretty wild, you disagree with the efforts to block spam on Hive too?

Hive has never filtered any data from the blockchain,
nor has Hive even considered doing this.