They have acted to stop Mullen's boot slogan of "Fuck the Tories" getting seen again. I think it's correct that something as offensive as "Fuck the Tories" should be censored. If we're not careful it'll be "Fuck the Tories" here, "Fuck the Tories" there, "Fuck the Tories" everywhere. Who wants that?
"Fuck the Tories"
"Fuck the Tories"
"Fuck the Tories"
"Fuck the Tories"
"Fuck the Tories" (damned predictive text)