Spamming or including spam in blocks? What do you mean? No one is stopping anyone from making whatever mempool policy they want. Especially now as they're not even removing the filter. Carry on in Core 30 with the same filter if you want. Gossip is going to relay these transactions no matter what your filter says. Now your node won't gossip about it to others so you can reduce how much they are "talked about" between nodes but the network will absolutely always know about them.