a relay is a central entity on the network thhere are many but each is a point of centralization. Placing yourself in a censorious role at the centralization was your instinct for solving an issue in decentralized space. There is no magic and it will end up killing your project. Once people understand that you are willing to stand between their tools and raw data there will be an exodus. face it now face it later. But dont mess around too hard. Some of us will take it personally.