Lack of interest Checkbox for Birthdate active/not active at registration

I think for my visitors it id a big hurdle to in the registry process to give (or ask) data like the birthdate. Although I have deactivated the minimum age checkbox in the ACP the fields appear in the registry process.
Please make there a checkbox to hide this question.
A search with the query "birthdate" does not give any result.
And I am not looking for more and more add-ons just to deactivate something very easy.
Now I found it also. But still I´am not sure if it is a good idea to give two suggestions in just one thread. If somebody votes it does not mean he/she refer to both queries