Acme Ideas

Today I drove from London to the quaint village of Hurley in Buckinghamshire for lunch in a pub and a stroll on the river. Our route took us past Westfield Shopping centre at about 11.30am. At 3.10pm I received an email saying that Westfield shopping centre was now following me on twitter. 

In the past I have received @ replies or follows from places I have tweeted about - Hampstead Heath has, I believe an active account which monitors the tweetesphere as does 'Mallorca_hotels'. But I've never tweeted about Westfield - the closest I have been is driving past today - I got within about 100m of the place. I did use Foursquare when I got to Hurley, about 20 miles away from Westfield.

Now my phone does know where I am and I let Google latitude broadcast this, but can this have triggered Westfield's follow? I don't know, and I don't know whether to be scared or impressed or both, or neither