I know what slipstream is and I don't agree. "the mempool" is a meme and valid transactions categorically do not cheat at anything. anyone can tell transactions to miners by any means they choose, bypassing your raspberry pi computer. it's a free country. and if more people keep adding placebo filters to their relay policy, it will lead to the proliferation of more private mempools. this could cause mining centralization. if you want so badly for this to not happen, relay policy should mirror consensus and nobody would create any private mempools.