Re: (Serious bit)
"Drug laws, seat belt and helmet laws" are designed to stop you becoming a drain on our socialised health services, as much as protect yourself.
If that's the intent then drug laws, at least, fail miserably. The amount of money that gets funneled into fighting the drug war when it might actually accomplish some good going into treatment programs for addicts instead is absolutely staggering.
As for seat belt and helmet laws, I think it's mostly a wash, at least here in the US. We don't have socialized medicine (though, in my personal opinion, it would be a vast improvement on our incredibly broken health care system even if I were prepared to accept the "socialist=bad always" narrative that's common here, which I'm not). Even if we did paramedics usually respond to traffic accidents whether there's an actual need for them or not on the grounds that figuring out whether they're needed would take minutes that can be the difference between life and death in such situations.
"curfew laws" most def protect me from you, if you are a noisy vomiting delinquent.
Which is why I can understand them in places that have significant problems with juvenile delinquents. But the simple fact of the matter is that most juveniles aren't delinquents, and treating them as though they are is a good way to breed teenage rebellion. For the most part in most places the only valid justification for curfew laws on teens is to make sure they get enough sleep for school because some of them (I was one of these back in the 90s) would otherwise be out all night but not necessarily causing problems.
"the ban on alcohol sales on Sunday" doesn't protect anyone, but does leave those in favour of the ban with a warm feeling inside and a sense of power over others.
I think those in favor of such bans frame it in their own minds as protecting the souls of us poor sinners who want to drink on the Sabbath. Which is ridiculous both in terms of their own religion (Christ's first miracle was to create wine so that a party could continue after all, and wine is called for in Communion even if most denominations use grape juice instead these days, and even barring that....well, go ask a clergyman what day of the week is the Biblical Sabbath and I think you'll be surprised by the answer) and and on the grounds that not everyone shares it.