An activist has received rape and death threats after US rapper Tyler, The Creator mistakenly tweeted that a campaign to have him banned from entering Australia was successful.Tyler, The Creator, whose real name is Tyler Okonma, is scheduled to perform in September, but a petition from grassroots feminist organisation, Collective Shout, has called on the immigration department to deny him a visa based on his song lyrics and behaviour during a previous tour. Okonma, tweeted on Tuesday: “T is now banned from Australia, you won @CoralieAlison, I’m happy for you”, despite the immigration department having made no ruling on his visa. However, Okonma’s fans reacted swiftly to his tweet, abusing Alison, the director of operations at Collective Shout.