Anyone see anything wrong with this?
The Home Secretary has the power to exclude an individual if she considers his or her presence in the UK is "not conducive to the public good".
Author and columnist Daisy Buchannan tweeted: "It makes me very happy that on #InternationalMensDay, Julien Blanc does not get to be an International Man."
Last year, Mrs May banned anti-Islamic activists Pamela Geller and Robert Spencer from coming to the UK to join an English Defence League demonstration.
In 2009, then home secretary Jacqui Smith refused to admit Dutch far-right politician Geert Wilders.
Full story:
BBC News - Julien Blanc: UK denies visa to 'pick-up artist'