I havent seen the article where he complained. So I dont know what he is complaining about.
If it is he went before he is suppose too, that is a bit harder to police, since the leader can start at whatever speed he wants. Basically it would only be evident he took off to early if he brought them down to a crawl then took off.
Now brake checking is another thing altogether. I think that should be discouraged anytime it is done. It wrecks the cars further back in the field when people do that. Warnings/restarts & even penalties should be given for brake checking.
I remember in one of my races in wenathchee, the leader kept doing that on restarts & our car was in the back of the field in a single line restarts. It caused more wrecks & cautions over & over again. I was warning my driver on the radio they were brake checking to stay on his toes, but if you dont go when the green comes out you are practically lapped on a 1/4 mile track, so he had no choice but to take his chances. it got to the point a couple of spotters in our spotters stand almost got in a fight over the leader pulling that chicken $hit crap.
So yeah if that is what Carl was doing then I agree with JJ. If it was just leaving early, well then they have been racing each other long enough to be expecting that & knows Nascar hardly enforces that one. (Although they busted Carl for it last year)