The track can inforce their rules,
The top pro classes in NHRA have head sets in their helments, although i don't know if they are on during the run but you can always hear the crew chiefs tell the driver what they ran,etc, i don't know if the driver can talk back or not.
It seems to me it would be a distraction rather than a gain.
In bracket racing the best cheater is still the manuel operated brake light swith especially if you have the slower car. :lol:
JMO
Zip.