I'd need to dig in order to find it, but it is, indeed, possible to make the brakes act MUCH different than the driver intended, once you have patched the ECU firmware. I'm not 100% certain you can completely shut off the brakes (as in, driver puts two feet on the pedal and it sinks to the floor without engaging any brake pads at all) however it may be possible to disable ABS or possibly to bias all braking to only the left wheels, for example.
