[kiicia]

which is nothing in comparison to leaking all of personal information

you can also introduce some jitter like changing age range only once a week/month/year for everyone

[travisjungroth]

Birthday, zip code and gender is enough to uniquely identify most Americans.

[stephbook]

Well don't reveal your birthday then. Wait 5 days to confirm >18.

If you run into a liquor store yelling "Im finally 18, here's proof." that's on you?

[casey2]

Of course you can still break the law. People are complaining that it's now illegal to do what you suggested

1 it requires DOB

2 it requires DOB to be accurate