With the upcoming age verification update, I'm assuming they're using the DOB that was provided when creating a VRChat account and cross-referencing with the DOB on your ID. What about the people who made a mistake when inputting the DOB like I have? IIRC the birth date is off by some numbers (I have a bad case of stupid). Or the folks who have their accounts given to them (willingly), I have 2 friends who fall into that category.
At the time, I didn't consider it an issue since VRChat didn't use the DOB for anything other than to verify if you were old enough (which I was at the time) and could have an account, but now with this update, it's becoming more apparent that this may be an issue.
Support said there was nothing they could do about it and that it was locked in, which was a huge letdown considering I was even willing to give my ID to fix the DOB I had input during my account creation. A lot of other social platforms give the ability to change your DOB at least once, and then never again.
Please create a one-time only change to DOB, you're getting your age verified anyways, if the DOB provided prints out that you weren't old enough to create an account at the time of creation, then just slap them with a community ban or something for a while. It'd really suck having to create a whole new account to fix one issue that could be fixed relatively easy on other platforms.