Well, unless he qualifies someday. I really don't see what's so wrong with riders having a bit of a go at each other on the slowdown lap. Down the years we've had Nicholls/Dryml, Nicholls/Sayfutdinov, Crump/Holder, Pedersen/practically everyone, etc... It just adds to the entertainment.
It's when it spills into the pits and mechanics, managers and hanger ons get involved that needs to be seriously looked at.