Yup. But if someone hadn't appealed it to Court making it binding, it could have been different.maybe, but the law as laid out and interpreted by the police can be used to snag any rider, aftermarket pipes or not. that's a problem that needs to be corrected.
If there was a good lawyer they could have poked holes in the unfairness due to the subjectivity of the law. Crown counsel would have seen that coming and decided THIS wasn't the case to lose, so might have dropped it without a decision being made binding on all the other JP's and judges.
But when someone walked in unrepresented, who doesn't argue well in Court or understand the rules, well, that's an opportunity to get a precedent that supports your side that you don't pass up either.
My professional association would use part of our dues to fund cases like this, but only when we thought we had a clear winner on our side.