Its OK to me for a club to raise the question about 3-D flying, but as long as you are obeying the club rules regarding safe flying, 3-D shouldn't be an issue. The biggy is no flying behind the flight line, as long as you demonstrate the ability to keep your plane in front of the line, there's not much to complain about except maybe "hogging" the runway by hovering for a long time. Our club has about 70 members and only 3 hardcore 3-d flyers(one is the president-club that is). It was brought up at one meeting but never went anywhere as us 3 always wait for open time to do our thing, actually, we prefer to fly alone, so we wait patiently for that time when we can hear our engines, and not have to watch out for anything other than our planes attitude. I've had to bail out of hovers on the deck when another plane zips by me going 100MPH and just misses me, I was at the extreme end of the field to stay out of the middle and still people "buzz" me. A small .40 glow at that speed is just as dangerous if control is lost, as a hovering 50cc gasser that looses control.