Its behaviour management system, developed in-house, is to be made available to local high schools by means of an open source licence.

BBC: Schools' computer costs have been rising

The KDDI system, is able to detect more complex behaviour by using analytical software - held on a server back at base - to match patterns of common movements.

BBC: Mobile that allows bosses to snoop on staff developed

That kind of behaviour - whether genuine or the result of some automated system - is raising questions about Facebook's usefulness as a platform where businesses can engage with consumers.

BBC: Facebook acts on fake ��likes��

Instead of using anti-inflammatory drugs simply to suppress the immune system, it might be possible to tweak it back to its normal behaviour.

ECONOMIST: Better living through chaos