Ghost of Barry Fairbrother (sometimes referred to as simply Ghost of Barry Fairbrother or Barry Fairbrother's Ghost) was an Internet username used by three anonymous posters on the Pagford Parish Council website. The account was created by hacking the original account of the deceased Barry Fairbrother.
The account was originally created by Andrew "Arf" Price by using a SQL injection to bypass the website's weak security measures, hacking the council website and obtaining the user information of the deceased Barry Fairbrother, which he then renamed "The_Ghost_Of_Barry_Fairbrother". He used the account to post scandalous, but nevertheless true allegations regarding his father Simon "Si-Pie" Price. Though the allegations were later removed, they proved extremely damaging, leading to Simon's withdrawal from the race for the open Pagford parish council seat and increasing his paranoia. The revelation of his illegal behaviour would also later lead to Simon losing his job, which he considered at risk after realising the steps other candidates (but actually Andrew) would take to prevent him from gaining the council seat.
The account was later used by Sukhvinder Jawanda (who had been similarly intrigued by a substitute teacher's discussion of SQL injections and researched it in secret) following her neglect and mistreatment at the hands of her mother Parminder to post damaging allegations about her. Sukhvinder claimed that Parminder had been secretly been in love with Barry; a claim that Parminder later realises is true.
Later, the account was used by Arf's friend Stuart "Fats" Wall (who learned from Arf's use of the account) to post allegations regarding his father Colin "Cubby" Wall about his intrusive thoughts of child molestation, and ending with a note that having so many of these thoughts must speak to Cubby's real desires. Unlike Arf and Sukhvinder's intentionally more detached styles of writing, Fats' post more clearly signalled the author's true identity, allowing his mother Tessa to deduce it was him.
Stuart took all blame for the posts made under the username and Arthur and Sukhvinder were never discovered regarding their complicity in the events.