Racing & brushless systems

I was reading a RC magazine & they stated that it`s "We`re finding out that just like with their brushed friends you can cheat just as easy".Their was more to that statement but I was wondering/thinking can`t the motor variables(Rpm,voltage & ETC) be controlled by the ESC.Kinda like how in in real cars they can limit Speed & other variables.
I assuming this could be done via a software