I still don't think it is bogus enforcement when the signs clearly indicate the hours the school zone is in effect. If you don't agree with the law, then it is a bogus law. But it isn't the police that make the law. They just decide how to enforce them. And they enforce them in such a way to bring in the most revenue, or where is the most problems.
Either way, here is good news for you. Tickets given out in school zones is way down this year, so they will be re-deploying staff elsewhere to make themselves more money. Or, most people now know to slow down in school zones, so our kids our safer. Or it lies somewhere in between those two.
http://www.metronews.ca/news/winnipeg/2016/06/24/winnipeggers-speeding-less-in-school-zones.html