Hashers, that is, people running “miner” appliances who choose to point them to pools that don’t use spam filters are contributing to letting through spam that 99.9 % of people don’t want and that could easily be throttled down if more of us pointed the said ASICs to pools that do apply spam filters.
At the moment the only pool I know of that applies spam filters is nostr:npub1qtvl2em0llpnnllffhat8zltugwwz97x79gfmxfz4qk52n6zpk3qq87dze so I pointed to it.
The more people do the more there will be pressure on other pools to use spam filters and thereby help to limit ( if not eliminate) spam.
I don’t understand why the theoretical point keeps being made that it is not possible to eliminate all spam. The same could be said about email spam and yet no one argues that filtering out email spam is pointless.