"Religions are fairy stories for adults" is scarcely the most incendiary slogan ever devised. It might be a question on an old-style A-level paper ("discuss"). A pensioner from Boston in Lincolnshire was, however, advised by the police that he risked falling foul of the Public Order Act 1986 if he put the message in his window. He might even face arrest. Well, sort of.
John Richards' "defiant" stand – the word comes from the original report in the Boston Standard – has attracted the support of, among others, the National Secular Society. Their president Terry Sanderson described the police reaction as "completely over the top", adding that "people have got to learn to get a thicker skin." Pavan Dhaliwal of the British Humanist Association commented  that the case "shows how subjective the law is, and how it has the real potential to stifle free speech."
Also supportive is Simon Calvert of the Christian Institute, the pressure group responsible for highlighting several free speech cases involving Christians. Calvert proclaimed  that "It is no business of the criminal law to impinge on such moderate expressions of belief... What possible justification could there be for officers to tell a man he cannot insult religion with a tiny poster in his own window?"
It's important to be clear about what actually happened in this case. First of all, Richards' poster has not, as yet, attracted any complaints. When I spoke to him he told me that the only reaction he had received came in the form of an anonymous letter which supported both the message and his right to display it. Nor were Lincolnshire police acting on their own initiative in warning him of the possible consequences were complaints to be made. They only discovered the existence of the sign because he wrote to them, informing them of his intention and enquiring if it might constitute a criminal offence. In setting out the circumstances in which it might they were, he thinks, "just covering themselves".
Richards, a retired journalist who is also chairman of the Apostrophe Protection Society, denies that the story is a publicity stunt. He contacted the police, he says, because he was worried about the legal position and wanted to protect himself. Nor did the police response cause him to take the sign down – or, indeed, to do anything except contact the Boston Standard. Nevertheless, however trivial, the story does highlight a genuine issue.
Section 5(b) of the Public Order Act 1986 makes it an offence to "display any writing... which is threatening, abusive or insulting, within the hearing or sight of a person likely to be caused harassment, alarm or distress thereby". The section is notoriously subjective – previous instances in which police have used it as a reason to intervene (and occasionally to bring charges) have involved Christian preachers inveighing against homosexuality, members of Outrage! protesting against the persecution of gay people by Islamic governments, a teenager holding up a sign describing Scientology as "a dangerous cult" and a student who described a police horse as "gay".
Peter Tatchell has argued  that it is "sweeping, draconian and has a chilling effect", especially as there is no requirement to prove intent to cause harassment or distress. He is one of many people currently urging that Section 5 be repealed or at least modified by removing the word "insulting". The campaign is spearheaded by an alliance of convenience between the Christian Institute and the National Secular Society, who said  in a joint statement earlier this year:
With such a low threshold, it is too easy for police – and thin-skinned activists – to fall back on when there is controversy and one side claims to feel offended. At the same time there are plenty of other, more targeted, offences available to tackle genuine cases like harassment, incitement and breach of the peace.
"Breach of the peace", however, is at least as much a catch-all as the word "insulting" in the Public Order Act. The real problem may be one of attitude rather than the precise wording of legislation: the existence of an official mindset that sees robust debate as potentially threatening to the tranquility of the public space, as a threat to be managed rather than as a freedom to be celebrated.
The other issue is that of the chilling effect, something that is only increased by the publicity given to unusual or exaggerated cases like that of John Richards.