I'm pro the current stance of donor release at 18 as minimum
I think it's unethical to destroy someones medical data without their consent, to the extent that when that person is an adult they can't access . Parents shouldn't be able legally signed away their rights permenantly before they were even born.
I believe it's up to my child and they have a legal right to make that decision as an adult. I don't think I should be able to decide that for them, and that the decision should rest with them as an adult
Practically I think it's important that anyone who donates is prepared for the fact that their ID will be released, at least the 18 criteria means they are aware of that and ameniable . It's a complete falsehood for places to promise donors anonymity in the modern age where DNA tests are given as birthday presents. In current systems abroad I worry that donor concieved adults face the brunt of donors who never considered being found, are suddenly contacted.
It's not as simple as keeping off DNA sites. I know someone who found their father via matching with an aunt on DNA site (not a donor situation). I can't imagine the rejection people might face if they found people who thought they were untraceable. ID release means everyone's aware it's possible
I do however worry about the routes people will use to avoid forcing more open donors.
In donor networks it's incredibly common for people to use completely anonymous donors abroad, especially as ivf is cheaper there, I had to pay much more to have it in this country where ID release is possible. Some of the common countries people recommend only work with anonymous donors due to the countries laws.
Donor Facebook groups are common. This is a real worry for me as there is predatory behaviour, zero traceability and accountability. I know of a couple who used it where their donor had got 10 families pregnant that month alone with natural insemination (basically sex) they had no health checks and they've no idea on numbers of siblings etc
Any drop in donors availability or increase in price will push more people through backdoor methods
Alternatively if people are worried about increased donor presence, then they may choose not to disclose at all. If they know there's more open access and decide not to tell the child then how would people ensure the children are aware? Who would tell them?
I think the priority should be encouraging more use of I'd release at 18, early disclosure etc and reducing the use of abroad clinics where that isn't an option, and moving people away from dodgy face book groups