In Oxford politics–the training ground for future Prime Ministers–the word “hacking” is usually used to mean the pursuit of political power via ingratiation and similar techniques (the dark side is known as “knifing.”) Boris Johnson, the Mayor of London, was a master of the art. He has obviously lost none of his talent. His Twitter stream has just sent out the following:

What a speech!! Speaking as citizen of the world that was exac what I wanted to hear from an Amer Pres’t

Incidentally, part of the point of Twitter is that it is a two-way conversation. I have learned a great deal from the people I follow–and I should follow more. @MayorOfLondon is following precisely 0 people. Now that’s almost a definition of “hacking” a social network.