Something like 'No using external visual aids' is all I'm asking for, I don't think that would give people too many ideas. I suppose people rarely check the rules, but at least it would be there if the subject came up.
But I do play BnG now with no regard for cheapness, that's the way it should be. Last clanner I played that way had no drama at all, hallelujah. I'd also like to replace BnG with something else, though this marking discussion applies to other schemes as well.