#Bitcoin Filters Work By Default, and That's a Good Thing | To Filter Spam From Your #Bitcoin Core Node, set “permitbaremultisig=0” & “datacarrier=0” in your Bitcoin.conf File | Use "blocksonly=1" to turn off your mempool entirely
https://www.reddit.com/r/Bitcoin/comments/19ehsd6/bitcoin_filters_work_by_default_and_thats_a_good/