They both screwed up.
Erica posing for a picture holding a Wally up behind a competitors trailer was asking for a pop in the face, at least that's the way it used to be.
But times have changed, with female drivers and lawyers behind every corner that stuff can't happen any more. Female drivers shouldn't take advantage of this "hands off" situation, I feel that she did that in this case.
But then Greg screwed up even worse. Getting pissed off, hell yes, any competitor would be and should be torqued off about something like that.
Football fans will probably remember a few years ago when Terrell Owens ran to the 50 yard line and did a little jig on the star on the Dallas Cowboys field after a touch down. One of the Cowboys ran out and popped him and I'm sure every player on his team helped pay his fine for that.
But Greg needed to think this through more, you can't ever let your competitors know that they are getting under your skin.
In situations like this its important to consult back with the coolest guy that ever existed on this planet, and think hard about how he would have handled it. I'm talking (of course) about Dean Martin.
Deano would have waited for his chance to zing her back (at least Greg got that right) but then when the opportunity presented itself would have busted off a casual comment that both totally put his adversary in their place while also using such a nonchalant style that it would be clear that the incident didn't really bug him that much in the first place (even though it really did).
The perfect time would be the next time he wins a race, and had beaten Erica in the process, of course if that was in the final round that would be ideal.
Then at the end of the final top end interview, something quick and funny with a smile on his face-
"Hey, also since my young friend Erica likes to take pictures, I'd like to invite her to take a few with my team and the Wally, we can use her trailer this time if she likes, I'll bring the beverages."