Scaremongering, at this point.
Of all the things that you could/should do to curb the spread of an infectious disease, a curfew seems to me to be the least effective thing you could do. How, exactly, is a curfew supposed to stop people from being too close together indoors in conditions of either high noise or poor ventilation or both?
If they want people to stop gathering indoors, the best countermeasure is to allow everything outdoors except huge, crowded events.
I was hearing on 680 News earlier today that Toronto was considering suspending the bylaw that currently prohibits drinking alcoholic beverages in city parks. That actually makes sense. If you accept that people want to see their friends once in a while, under current circumstances, do you want them to do that indoors in their own homes hidden from public view and scrutiny, or do you want them to do that outdoors and accept the possibility that someone might want to have a beer or two?
edit: Most other civilised places in the world, don't have a problem with someone having a beer outdoors in public (as long as they are not causing a disturbance, of course). IMO this is a bylaw that should go away permanently.