W3irdN3rd: Don't you think that's a bit naive? If you collect a million signatures for something you'll often get little more than a shrug. Laws that nobody breaks, don't cause trouble, missed revenue or create electoral risk are unlikely to be scrapped.
I understand your sentiment, I do. But in my opinion this does not guarantee anything in case of law changing. This is a good tactic against private companies, who base their actions on financial gain. Governments work differently.
I personally don't know any political party, that would backpedal on a decision they made, no matter how much people would break the law. This would only be a sign of political weakness. From my perspective laws change mostly after elections, when a new political body comes into place – and you don't really have to enter full rebel mode and risk legal penalties for the opposing parties to notice that your unsatisfied with a certain law.
W3irdN3rd: It is unreasonable. What kids watch or play is parental responsibility. The age check for alcohol purchases can be done by the shipping company upon delivery which is more effective than an online check.
With all the data leaks and whatnot, anyone should aim for as few organizations as possible to have knowledge of which porn sites any given individual is subscribed to. I wouldn't be surprised if at some point you could be denied car insurance because you played too much Carmageddon or blew up too many personal vehicles in GTA Online if databases with that information leaked. You wouldn't be told that was the reason, but such information could be used to decide which client to accept or reject. This already happens with various kinds of information. Don't you dare live in the wrong ZIP code..
So long story short I think it's good that GOG doesn't actively share what you play with other organizations. If you allow the government to force you to share this information you'll just find yourself on a slippery slope.
About the example with alcohol shipping. Firstly I see no basis for a delivery man to ask for my age when he's at my door. He's just the middle man, he's not selling this himself, so he has no personal responsibility in the matter. It is the responsibility of the shop owner, and it should be done before the transaction takes place, not after, cause technically he already sold alcohol to a minor, and broke the law. Secondly, at least officially, the delivery man should not know exactly what is in the package - this would violate the privacy of the buyer.
I never said I advocate for selling your private information. Confirming your ID online does not equal giving the right to sell stuff about you to different companies. Of course I know some of this stuff you said happens, but I don't see the connection to what I said.
Besides, most online services require you to insert private information anyway, so age verification adds nothing to this. You could make it like so, to only give the number of your ID card, so that an online store can verify with a government site, if you are green (an adult) or red (minor) - there is no need to give away anything else.