There isn't some sort of generic law that says "license plates must be clearly visible"?
Really, the joke goes that if you want to kill someone in Ontario then do it while driving your car. It's even better if your victim is on a bike. Then you get a 500$ fine and back at the wheel. "Woops, didn't see them" is a valid defense, no matter the circumstances.
https://kitchener.ctvnews.ca/cyclist-dies-after-being-hit-fr...
A year later, all charges dropped on account of an apparently burned out streetlamp. The lawyer called it "happenchance":
https://www.therecord.com/news-story/8354441-charges-dropped...