Lol you can order a cigar or pipe tobacco on the internet completely legally without any ID check. Most people don't know this. You can do it with wine, too, for the vast majority of the US. It's not really a problem.

I suspect you need a credit card though? Can kids sign credit card contracts without parent consent in the US?

Moreover just because that laws and regulations are applied inconsistently in the US (and we are talking about Denmark here), does not mean we should completely do away with them.

Not sure if it's changed but I had a debit card and bank account from age 15 when I started working as a kid. I got it without even involving my parents, not sure if you can still do that now, it was before the KYC stuff ramped up to the nines.