ROFL
I am not in favour of cutting, but on an oval, I do not see the apron as cutting the track - unless - there is a rule that states you may not use the apron. AFAIK only NASCAR has such a rule. I do not think it should be allowed as it takes away from the spirit of the oval, so something should be done to disallow it. But, as it is now, it is a perfectly legitimate practice.
However, cutting the track over grass or straight-lining a chicane on the other hand is not a legitimate practice, and should not be done or allowed; in racing or hotlapping.