In French, but a site here collects the cases of abuse of authority by (some) of the local police.
n.survol.fr/n/verbalise-parce-queA common theme is that some cops will fine illegally you if you looks like you have fun, e.g. going to shop riding a bike instead of a car, or digging through your grocery bag - with no protections - and fining you if you have a pack of biscuits. While not obeying social distancing (they ride all in the same car) or containment measures (masks) themselves.
I even head on national TV an "expert" ranting about people who surf, it was clear his in mind that it was because they were seen having fun and it should not be tolerated in a case of a crisis, without any logical thinking on his part.
Again, I am not in any way justifying this behavior. Just warning you that it will probably happen as the situation drags on, and some authorities will try to find more and more scapegoats to cover their incompetence or just appear to do something. Here in France the government now has provided more fines (250 AUD+ each) than it has provided masks...