I think they know it but they want to see if you know it -- they can't be sure until they try. And then there are the players who know it will be a foul but shoot before you can ask for someone to watch.
Bob, and then there referees who know it, watch the shot and don't call it because they are afraid to face the controversy.
This I'm sure was part of Grady's argument and why I said I agree with totally forgetting about double hits if Grady's idea was followed.
I'm interested to hear your thoughts that I asked about in an earlier post, and no one touched with a 10 foot pole, on balls scooped under by accident, they jump up, the shot is made and the player is allowed to continue. To me this is the same kind of grey line. Its a foul no one wants to call.