Frankie Boyle is another celebrity that has done pretty well increasing his profile by being outspoken (read: horrible to people) on Twitter, including, interestingly, the aforementioned Piers Morgan. Whether hes right or wrong about his opinions doesnt really matter, as usually hes pretty entertaining about it which makes everything OK. His spat with James Arthur probably attracted the most attention, with the X Factor tantrum factory eventually quitting Twitter, but this one to Piers Morgan is probably one of the more delicious.
