Emma Watson actively encouraged people to give money to Mermaids even though it was public knowledge at the time that Susie Green took her 15 year old son to Thailand so he could have his genitals removed as a 'present' on the morning of his 16th birthday.
Watson isn't stupid and if she had done the bare minimum of research she could have seen the video of Susie Green laughing about the fact her son's penis never grew, because he had taken puberty blockers. They had to remove a third of his colon to construct a 'neovagina' for him.
(Anyone can confirm this for themselves by going on YouTube and typing 'Susie Green laughing' in the search bar.)
Of course we've had the Cass review and puberty blockers are banned now, but how many vulnerable children took Mermaids seriously as a result of patronage by people like Watson who were too lazy to check the facts?