Illegitimate – or predatory – journals are on the increase. What’s more, authors from high-, middle-, and low-income countries are now known to be publishing in them. Find out why this is the case and how we can work as a community to help stop their spread, in this interview with Kelly Cobey and Larissa Shamseer of Centre for Journalology, Ottawa Hospital Research Institute, to coincide with their new paper on the topic in Nature Human Behavior.