We don' need no steenkin' titles!

"How difficult is it to capture a date of birth and send a relevant offer each year [...] ?"

Not bloody difficult enough, as this is a key piece of info data and ID thieves need to swipe one's identity. Unfortunately, the Twitterati are all too willing to give up this key identity attribute to just about anyone who asks. For me, if you ask I'll be happy to tell you either:

30 Feb 69

-or-

Bugger off!