Tal:
First, probably because we broke the old record so badly no one sees a need to try again! It was close to 1,100 (folks in Sun City Center, near Tampa, early Spring 2005). We gathered better than 3,200.
Second, my memory is that Sumter County Sheriff Bill Farmer and/or his staff actually capped our try for logistical reasons! There were rumors that 10,000 wanted to participate!
As it was, it took some four hours to pass a given point!
It was fun event!
SWR