One of the reasons we decided to set up an Octagon twitter account was to deal with the issue of “robots” joining our feed. Consequently Octagon, for the moment, has joined the TrueTwit (www.truetwit.com) service.
Robots in the I.T world are computers that attempt to subscribe to services and can possibly send you loads of spam email. At Octagon we prefer to deal with real businesses with a human in charge.