Social media expert's "fired ghostwriter" takes over Twitter account

The Twitter account of Mark Davidson, a self-described social media professional, has apparently been taken over by someone claiming to be an ex-employee who had been paid to ghostwrite Davidson's tweet-feed. Actually, the hijacker claims to have been part of a staff of three such ghostwriters, and makes further damning accusations about Mr Davidson's social media competence.
Unfortunately using ghostwriters on Twitter isn’t anything new or particularly unusual – even some of Twitter’s biggest names have done it – but that doesn’t mean it’s a good idea. At best it’s lazy and duplicitous, and hardly puts the ‘social’ in ‘social media’, and at worst it all goes pear-shaped like this.
Social Media ‘Professional’ Fires Twitter Ghostwriter, Forgets To Change Password, Hilarity Ensues