Black First Land First and its leader Andile Mngxitama have been found to be in contempt of a court order, and threatened with arrest if they continue to harass and threaten journalists.
This emerged during an urgent application by Sanef in the High Court in Johannesburg on Tuesday to have Mngxitama arrested and jailed for 90 days if he is found to be in contempt of the order.
Judge Sharise Weiner ruled that she would not impose a financial penalty.
If the BLF and its members do not stop harassing and intimidating journalists, they will be arrested immediately, the judge warned.
Mngxitama was sentenced to a three month jail sentence suspended on condition that he complies with the court order.
The judge said it was clear from videos that the respondents were in contempt of the court order.
On July 7, the court granted an order to the SA National Editors' Forum and 11 journalists, interdicting BLF and Mngxitama from harassing, threatening, intimidating, or coming to the homes of any of these journalists, or from threatening them on social media.
Sanef brought the urgent application after Mngxitama and BLF members tried to enter a Daily Maverick event, "The Gathering," at the Cape Town International Convention Centre last week Thursday. Security guards stopped them.
On July 27, BLF members disrupted a discussion about state capture at an event hosted by the amaBhungane Centre for Investigative Journalism, in Braamfontein.
On June 29, BLF members protested against "fake news" outside the home of Tiso Blackstar Group editor-at-large Peter Bruce.
On Monday, 26 BLF members appeared in the Pretoria Magistrate's Court on charges of public violence and trespassing. In July last year, they forced their way into former public protector Thuli Madonsela's offices and demanded to speak to her. That matter was postponed to November.