So assuming that the implementation of the idea is completely smooth and unobjectionable, I still am not sure that I would be for age-gating in general. The main reason for this is that once you start applying blanket bans on anything, you suddenly have to start worrying about edge cases, and there are always cases that you haven’t thought about. Those people are the ones who end up falling through the cracks, and how severely it hurts them depends on what type of services you’re trying to offer. If it’s just entertainment, then it counts as an annoyance, but the more vital to life you get, the more you’re going to inevitably hurt the people who are left out.
There are two edge cases I can think of myself that I’ve personally experienced. I have a kid, and we’ve gone the “kid account” route in a few cases, usually related to gaming. Most sites and services have a “family” option that lets you sign up for a “parent” account and then designate other “child” accounts that have fewer freedoms for safety reasons. It’s a great idea in theory, because of course I don’t want to give my kid unlimited access to my credit card or potentially objectionable materials. But what happens if my kid wants to make an in-app purchase that we don’t find objectionable? You’d think that would be straightforward, but almost nobody has managed to get it right. The best case scenario would be to buy it under the parent account, then make it available to the child account, but very few stores allow you to do this because they want to tightly restrict content and keep it from being potentially shared to other people who didn’t pay for it. Temporarily enabling purchases? Not even an option on most kid accounts.
And that’s just dealing with in-app purchases like skins and DLC. There’s plenty of stuff out there in a game store, for instance, that I don’t find objectionable, but the store does, and that means my kid doesn’t even get to access it. Sometimes the store has marked it as objectionable because some other country halfway across the world (or maybe a local parent who complained? Who knows) doesn’t like anything LGBTQ+ adjacent in their games, and so that restricts our choice over here as well. I’ve gone through so many headaches trying to get this crap to work, and the answer is always just to forgo the child account and police content in our own house, as parents.
Another, much more serious example, is from my own childhood. I grew up in a really conservative household, where my parents did not like to talk about being queer or having mental illnesses. Even if I had gotten them to talk about these things, it would have been colored through their own hate-filled rhetoric and full of inaccuracies. But having access to the internet gave me an avenue for learning about myself in healthy, medically-backed ways that I would not have otherwise been able to access. It wasn’t until much later in my life that I got treatment for depression, for example, but knowing how it worked and–more importantly–that I was not alone helped me cope until I got there.
I know you’re just talking about age-gating social media, but I wonder about those edge cases who are being restricted by abusive, or simply misguided, parents who don’t want their children to learn about themselves. What resources would they be losing out on? Would sites like this also implement those “mandatory parental screening” rules that let parents see everything they’re doing on those sites? What other privacy would they lose as a result?
I suppose it’s not just the age gating itself, but everything it brings with it, that really worries me.