Probably true that he uses an illegal curve. Problem is they not only need to stop play at the request of the opposing C or A, looking like babies in the process, they have to prevent Ovie from getting to the bench and putting his stick on the rack, ostensibly allowing the manager to hand him a legal one before the refs come to measure. It's only a minor penalty and hardly worth the challenge.
Tortorella used to send his PK unit out with polearms and I don't recall much fuss being made about that.