Yates was frustrated because he was having a decent run, and it was the end of a very long, tiring race. But that's no excuse for hitting the guy twice. You can jaw at someone all you want, but when you start swinging you are no longer acting like a professional.
Don't know if I'd go to the extent of a lawsuit (But Fania may be doing that so that the whole thing is documented, not really looking for a criminal suit) - But Yates should be fined and suspended for a race or two. (Kinda like NFL and other pro sports).
Pretty good race, though. Lots of lead changes for all sorts of different reasons.
MJB