yes I know, and it's a very stupid question. if you relay blocks at all you are already relaying illegal data. this is a fact. if you are afraid of that you shouldn't run a bitcoin node. you are trying to make this into a thing where you are being safer or more virtuous by pretending valid transactions don't exist for their first 20 minutes, making your node run less efficiently for no benefit, and like I already explained it doesn't matter. you want to have your cake and eat it too.