I am against all age-verification systems here. These are ways to try to control the flow of information - aka censorship.
There are a few situations where I can see verification is necessary; number #1 is in regards to online transactions involving money from a bank account. But the whole "show your age to watch pr0n" - that is just rubbish nonsense. Same with "people of age 14 are too young to use anti-social media". Now, I think people should quit wasting their time with facebook and so forth anyway, but I consistently reject these attempts to restrict freedom by state authorities acting as lobbyists for control-freaks, dictators or over-eager corporations. The internet could not have gotten big with those restrictions in the first place - so let's remove all of those without mercy.