Pilot reported that a flight of two aircraft did not communicate their intentions on UNICOM; resulting in several near misses as the two aircraft maneuvered in the traffic pattern. Reportedly; this is a known and recurring problem at the airport.

Narrative

I was returning VFR/VMC to ZZZ. I flew a straight in to Runway XX and announced my intentions and position numerous times on frequency Unicom (CTAF). On short final; two RV aircraft pulled onto the runway without transmitting on UNICOM. I called '1 mile final' and shortly later 'go around.' As I started my go around; I displaced to the right over the taxiway away from pattern; and to keep the formation in sight. After I started my go around; the two aircraft started takeoff roll without transmitting. I called to takeoff aircraft that I was displaced to right on go around. There was no response from formation. Other aircraft on the field made comment on UNICOM about safety shown by aircraft at ZZZ in general. At the departure end of the runway the formation started to pull away from me. I received what I believed to be my first transmission from the RV formation. I was told 'it wasn't even close;' and why was I 'flying over the hangars; don't you read AIM.' He said we would talk later and 'he would find me.' At normal crosswind turn point with formation still straight out I called and asked if RV's were straight out or crosswind. After no response I turned late crosswind and called position on radio. I then saw they turned crosswind without calling position. I turned tight downwind to stay inside faster aircraft. At normal base turn position they started a left turn without calling and cut across final with turn to east. I feel the most dangerous part of the situation was not the near miss; but the formation's disregard for other aircraft at the field. The only time the formation called on the radio was to give me feedback on what they thought of my airman-ship. ZZZ is very busy with lots of students. Upon going to the FBO I found out they were well aware of the incident. They rolled the FAA FAST Rep since this is a continuation of a problem that FAST Rep has personally experienced. I believe there will be an aircraft accident at ZZZ unless the RV formations work to safely fly with everyone at airport; fly normal patterns; and TALK on the radio. When I talked to airfield Assistant Manager he said he was well aware of the problem.