This afternoon, I’ve been playing around with Facebook’s ad platform. Partly for Vagueware, partly for other businesses, I’ve been looking at what Facebook says about its user base to advertisers.

The level of targeting is just outright astonishing. It allows for ads not only to be targeted on demographics such as age range and city, but even on interests and relationship status.

For example, I now know there are approximately (all figures given are approximate to the nearest 20 or so), 120 people in Manchester interested in Programming.

Out of the 2,017,440 UK citizens who describe themselves on Facebook as ‘single’, 998,900 are male, 904,960 are female. The numbers don’t add up because some people don’t define a gender which makes the point that if you don’t fill info in, you can’t be targeted via that info.

There are 1,180 females in the UK who declare an interest in ‘Computers’. The figure for males is around 8,540.

580 UK men say they’re really into shoes, with 14,300 British women aspiring to be Imelda Marcos.

There are around 5,680 people working for BT in the UK on Facebook. In the US, there are around 40 people working for O’Reilly Media who mention it in their profile. I could target either with an advert - handy if you have a product or idea you want to pitch.

This is just the tip of the iceberg. Advertisers don’t need to know who your friends are (the social graph), to target you this tightly. If a member of GeekUp wanted to put up a singles ad for all single women between the ages of 24 and 32 who are into computers resident in Manchester (approx. 100 of them), they now theoretically could. Lucky ladies.

The question is, is this really a bad thing? Doesn’t it mean we’re not all going to see advertising that really has no relevance to us? Or does this kind of marketing mean that we are the perfect willing victims for advertisers to go deep into our psyche? I knew this day was coming, but I thought it was still some way off.