If you want to be cool then you say "fuck the government, fuck the police". Its a big part of the reason, a lot of people want to show off by breaking rules for street cred.
I'm not sure it's that simple. I think most people breaking the rules just think it doesn't apply to them. Like they're healthy, they're low risk, they're good at following all the other rules ("we won't get close to anyone while we're out, we won't touch anything we shouldn't").
I assume it's a bit like washing your hands after using the toilet. Most people do. I don't think those that don't are saying fuck you to society - they just think "I didn't pee on my hands, there's no mess here".
I guess if something doesn't immediately affect you, it's easy to think it will never affect you and it's not your problem to deal with.
Thing is though the government is not saying don't go out. You have to go to work, (if you're essential). You have to go to the grocery store. And truth be told, you should be exercising to keep up your immunity and overall health. That's all good stuff.
But when you're calling up your friends to go on that errand with you, or to go on that walk, or run, or bike ride with you, that's where I think people are going off the rails. I think the government and public health people probably meant for us to do this stuff alone. So there would be no need to say, "WE won't get close to anyone while we're out". Because you're not out with anyone. Only one family member needs to go to the store. Your bicycling group is still unsafe even if you're keeping 2 meters away from each other. Etc etc.
The question is, does ubiquitous surveillance help alleviate this sort of thing? My suspicion is that it doesn't. I'm thinking this is an education issue. A lot of people still aren't getting it.
There are certainly a group of folks who are just trolls, and intentionally do the opposite of whatever their political opponents recommend. Look at the idiots who modify their trucks to "roll coal". Or people who intentionally burn more energy because they think climate change is BS.