A date of birth requirement is patently offensive and yet another risk factor in identity theft. I think it shows extremely poor judgment and a contempt for customers.
And there is no explanation given as to why Adobe deems this necessary (if it’s a minimum age thing, a checkbox suffices for that).
Is this even compliant with European Union regulations? How will it be used or shared? Why promote identity theft? (Adobe has no guarantee of not having a security breach).
No big deal? See the huge security breach months after this was written.
OK, so you raise your risk of identity theft as per above (lying about the date is the best approach).
Except that it is a violation of the license agreement section 7.1 to do so (“account info will always be complete and accurate”). Hence Adobe can keep your money and terminate your service if you lie about your date of birth (see section 6.5c on non-refundable fees).