In July, when we switched off VIVA's request for a user's personal details, we built in a little joke. We didn't eliminate the requirement from our database to record a person's age and gender - it would be far too much work to redesign our entire sign-up process and database architecture; instead, we assumed that everyone who signs up to VIVA is female and born on 1 January 1990.
A little part of me giggle every time I think that, one day, a girl will access her profile screen in VIVA, and see that VIVA has somehow figured out their birthday was 1 January 1990... and fall off her chair, exclaiming, "How did it know???"
In hindsight, for maximum impact, I should have picked a more obscure and random date like 17 August 1989.
Maybe I can do that now.