TNT has implemented a new security feature which allows you to set a requirement to fill out the birthday information on your account when you log into an 'unfamiliar location' (not sure what this means exactly). I would guess this is their reaction to the recent CG'ing going on You can find the setting under 'Preferences'
It's not. But if the account hasn't been logged in within the last 180 days it will still be bday locked obviously. xD
But if you disable this feature, and do not log in for 180 or 90 days.. Youll still going to be asked for your birthday date?