Want to follow Bud Light on Twitter to see hundreds of pictures of carefully arranged beer bottles? As outlined on its blog, Twitter has now introduced an age-screening system that it says will help alcohol brands safely grow their of-age network. As they fill in their birthdays, Twitter cross-checks them against national drinking age limits, and either revokes access or allows the follow request. Twitter says it wont remember your date of birth, but, as Venturebeat points out, the new age gates fine print suggests your data may be shared with third parties for marketing purposes.