A 15-year-old boy in Britain has been arrested after mocking a local politician on Facebook, including by posting an altered photograph depicting the councillor as a rabbit.

It sounds like a satirical headline. Unfortunately, it's a real story, and a disturbing example of the growing threats to freedom of speech in the United Kingdom.

The teenager, a supporter of Nigel Farage’s Reform UK party, had been posting criticism of Conservative councillor Simon Bennett, who sits on Wolverhampton City Council.

In one post, he shared a photograph of Bennett with rabbit ears, whiskers and teeth, joking that the rabbit was devouring what remained of the Conservative Party's credibility.

Other posts criticised the councillor’s clothing at council meetings, including a comment comparing his appearance to that of a "rent boy", which Bennett considered homophobic.

Bennett complained to police, describing the posts as targeted harassment.

On August 3, four West Midlands Police officers arrived at the boy’s home and arrested him.

According to the teenager’s account, he was taken to a police station, placed in a cell, fingerprinted and subjected to a DNA test. His electronic devices were also seized.

Police have not publicly confirmed the precise grounds for the arrest, although correspondence with his lawyers suggested the comments “could be considered a hate crime offence”.

The boy was released on bail, and the Free Speech Union is assisting him in challenging the police response.

Of course, politicians should not have to endure genuine threats or harassment.

But there is an enormous difference between criminal harassment and a teenager posting insulting political commentary or an unflattering meme.

In a free society, politicians must be prepared to face criticism, ridicule and even offensive jokes.

The implications extend well beyond Britain.

Here in Australia, the Albanese Government has introduced its own Digital Duty of Care Bill, which would impose new obligations on online services to identify and manage potential harms.

Senator Alex Antic has warned that the legislation could encourage online censorship, while expanding the eSafety Commissioner's investigative powers.

The Australian proposal does not create the same police arrest powers involved in the British case. However, it raises a related concern: when governments and regulators get to decide that criticism constitutes online harm, lawful expression becomes vulnerable.

HRLA has already cautioned that vague regulatory standards and severe penalties could encourage online platforms to suppress legitimate political, religious and conscience-based speech.

The British case is a colourful but alarming reminder of what can happen when authorities lose sight of the importance of free expression.

Freedom of speech is not merely the freedom to say things that everyone finds agreeable. It is the freedom to criticise, challenge and even ridicule those in positions of power.

That freedom must be protected.