Just been subject the first example I have seen of Foursquare spam. A movie has created a fake identity (Subterrestrial Research Association) which it is using to solicit friends on Foursquare. It is then adding the cinema venues where the film will run as Things Done. Its latest venue added is a cinema in Ipswich, which I guess is why it has found me (my location being Suffolk). It also has a Twitter identity and more conventional Facebook page (under the identity of the actual movie).
Is it spam, or is it digital marketing, is there a difference, does it work? Well, I looked at the Foursquare profile, if only to find out what a Subterrestrial might be the mayor of.