"If she could have done one thing to make absolutely sure that every single person in this school will read your interview, it was banning it!"
-- Hermione Granger (OP26)
This rule said that any student found in possession of The Quibbler magazine would be expelled.
- Harry had done an interview with Rita Skeeter that was published in the Quibbler. Umbridge censored it by passing Decree Number Twenty-seven, which as Hermione pointed out, probably ensured that every student would read it (OP26).
- When Umbridge tried to find and confiscate every copy in the school, the students transfigured the Quibbler pages to either look blank or resemble textbooks for anyone but themselves (OP26).
- Fred enlarged the cover of the Quibbler and hung it on the wall in the Gryffindor Common Room, where Harry's enlarged head said rude things such as "Eat Dung, Umbridge" or "The Ministry are morons." (OP26).