Comment by iamnothere

Historically, at least in the US, people are indeed explicitly allowed to lie or spread misinformation in the town square. This is specifically allowed by the first amendment and backed by court cases. Your mention of the “town square” here is interesting, as Marsh v. Alabama and Pruneyard Shopping Center v. Robins both center around this idea. In both cases the Supreme Court ruled that unrestricted free speech was allowed in the town square, whether it was a company town or a shopping mall, so long as the location was effectively serving as a surrogate town square.

Now of course this is about the UK. But to my knowledge and based on research there are no laws or cases about lying in public. As long as you aren’t committing perjury or slander, or urging violence, or inciting a panic, this isn’t illegal.