Perhaps as you say he might realise he has crossed a line. And his actions didn't exactly garner him good PR nor the team good PR.
But incidents of crossing the line have occured throught the years of F1 and will no doubt happen again.
Prost/Senna taking each off.
Schumacher taking out Hill to win the Championship and remember in 97(?) schumacher lost all his points for that season for side swiping Villeneuve