I'm not sure if this has been brought up. I've noticed recently that new forum accounts have their birth dates automatically set to show on their profile. I'm not sure if it's been set to automatically show or something; but I think it might be in the best interest to have it automatically hidden for the sake of confidentiality.
It shows birthdays with the year........... Some people aren't the most creative with thier usernames and if someone really wanted to could dox people.
In terms of doxxing, I feel using real name + real life photo will increases the chances of getting doxx, not so much for birthdays