> It is either illegal to run a node or not. You are either serving CSAM or not. You seem to be equating these two things but I don't think that's valid. If the blockchain became illegal the moment *any* CSAM entered it, then it would already be illegal, because there is already a small amount of CSAM on it. (source: https://www.theguardian.com/technology/2018/mar/20/child-abuse-imagery-bitcoin-blockchain-illegal-content) Since it is not illegal, it must follow that a small amount of CSAM does not make the blockchain illegal. And therefore it is not binary, as you seem to be claiming. Spam filters that help reduce the amount of CSAM are good even if they don't entirely eliminate it.