The worst fool is probably the nontechnical knots user who does not even understand the discussion but wants to run knots only because of some ideology.

So you really run lnd on top of knots and you are not afraid that your node will filter an important tx with arbitrary data? For example: i open a channel to you. Swap balance out and close it with old state, adding some op return so your node will not accept the tx. There will be no punishment tx and i get the sat. Or do you rely on a non knots running watchtower?

Knots only filters the mempool. And there is not one mempool. Every node has its own mempool. It has no effect on the tx that get in the next block. So knots refuses a tx but when the block is mined it will ask for this tx it refused before.