Legal issues
In 2018, Stephanie Hayden, a transgender woman, sued Linehan for harassment. Hayden alleged that Linehan had shared photos on Twitter of Hayden's family and her life before transition, suggested she was a criminal, and repeatedly misgendered and deadnamed her. Linehan in turn alleged that Hayden publicised several private addresses linked to his family to silence him. Police issued Linehan a verbal warning not to contact Hayden.
In August 2024, Scottish actor David Paisley brought a defamation claim against Linehan in the High Court. Paisley alleged several statements about him on Linehan's Substack and social media were defamatory. At a pre-trial hearing, a judge ruled that several publications about Paisley were potentially defamatory. Linehan said he would prove he had not libelled Paisley during the trial and launched a crowdfunding campaign for his defence.
In April 2025, Linehan was charged with harassment and criminal damage following an incident at the Battle of Ideas conference in London in October 2024. Linehan was charged after posting comments about Sophia Brooks, a 17-year-old transgender activist, calling her a domestic terrorist and a groomer, and throwing her phone on the ground after confronting her in public and asking how many children she had groomed. In May, Linehan pleaded not guilty to both charges at Westminster Magistrates' Court and was released on bail with a condition not to contact Brooks.
Linehan's trial began on 4 September 2025. On 5 September, after having heard evidence over two days, the judge adjourned the trial until 29 October. On 25 November, Judge Clark cleared Linehan of the harassment charge and said she was not certain that Linehan had demonstrated hostility based on Brooks's being transgender. Clark found Linehan guilty of criminal damage to Brooks's phone. She fined Linehan £500 and ordered him to pay court costs of £650 and a statutory surcharge of £200.
On 1 May 2026, the conviction was quashed on appeal. The court stated that, due to the lapse of time between the incident and Brooks taking her phone for repair, it could not be sure that the damage had been caused by Linehan.
On 1 September 2025, after arriving at Heathrow Airport from Arizona, Linehan was arrested by armed police on suspicion of inciting violence. He was questioned in relation to three posts on X, including one in which he posted: "If a trans-identified male is in a female-only space, he is committing a violent, abusive act. Make a scene, call the cops and if all else fails, punch him in the balls." He was briefly hospitalised for high blood pressure and then released without charge on police bail. He said his bail condition was that he must not post on X; he said the following week that the bail condition had been dropped. Linehan's arrest was criticised by J. K. Rowling, Elon Musk, and British politicians such as Nigel Farage. On 8 September, Linehan told the BBC he planned to sue the police for wrongful arrest and false imprisonment. On 20 October, Linehan was informed that, following an investigation, he would face no further action. In May 2026, the Metropolitan Police apologised to Linehan for "distress and impact" and later paid him £25,000 in compensation.
The controversy over the arrest prompted widespread debate and calls for a change in the law. The Metropolitan Police announced it would no longer police Non-crime hate incidents and its commissioner, Sir Mark Rowley, said that policing "has been left between a rock and a hard place by successive governments", with officers having little discretion over whether to investigate Linehan's tweets. Rowley also said: "I don't believe we should be policing toxic culture wars debates and officers are currently in an impossible position. I have offered to provide suggestions to the Home Office on where the law and policy should be clarified."