Strip clubs having an 18+ identity check is usually handled by the strip club itself not the government. And my ID probably doesn't go to some database when this happens. Its just checked by a real life person and thats it.
Why would it be any different online? You're not submitting your information to the government, you're submitting it to the site runner/owner. The onus is on
them to ensure they verify identity, just as it's on the strip club bouncer or the convenience store clerk to verify age before selling restricted items.
If you have to be 18+ to go into an adult porn video store, or an adult club, or an adult novelty store, or buy an porno magazine, online should he held to the
exact same standard. That's not an anti-porn position. I'm not calling for the banning of porn. Just that the rules be consistent. Society, at least here in the US, has decided that anyone under 18 shouldn't be legally allowed to access porn. I don't want to hear any excuses about why it can't/shouldn't be done for online sites because what you're doing is establishing a different set of rules for the internet which opens a bigger pandora's box regarding
other age restricted things.
Also, the complaint of "I don't want my information going to a database" is kinda meaningless considering everyone's ID is already in multiple government
and civil databases already. You probably don't even know how many. In the US, there are 14 conditions where your DL or state ID information can be shared, many of which don't even require your authorization.