I don't know why Phil is stirring up a tempest in our little teapot but I certainly see no indication that track owners anywhere are actively "banning" anyone that behaves and wants to spend money.
I look forward to brushless stuff coming into our market and I hope that it will reduce the expense of racing really fast slot cars.
Back when faster motors were less expensive there was a natural progression toward using them instead of becoming mired in a class that tried to restrict expense by limiting the motor.
The "Peter Principle" should apply to everything but your wallet.