Had an angler walk past me the other morning and try and call me out for fishing too early.
I'll bet he thought the you couldn't start until sunrise because the wording on the DFO web page changed a couple years ago. Where it used to explicitly say one hour before/after sun etc, now it just say 'daylight hours'. Of course that means the same +/- 1 hour, but the formal definition of 'daylight hours' is on a separate DFO web page that's not even linked from the region 2 web page.
I had the same debate in pre-dawn a couple seasons ago. It was friendly, but the current wording might be the source of some confusion...