Is this really that big of a problem?
I have only been at the field once when a person brought a plane capable of a really low torque roll. This pilot was 17 and brought a 33% Radiocraft extra out to fly. He approached all of us and let us know of his intentions. He would first fly the IMAC sequence then come in low and slow to do some 3D stuff. He was torque rolling just above the runway to the delite of all of us watching. Sure, he did tie up the flightline for about 15 minuites but for me it was worth watching. It is not everyday that I get to see a $4,000 plane at our field.
Honestly, if it is that offensive to you send your plane up in the air and fly normally. I would bet that the 3D pilot will not appreciate you doing low flybys while he is doing torque rolls and will most likely stop flying these maneuvers. To each his own but I get as much joy watching as I do flying.
Phil (Mesa, AZ)