There's an interesting story about Noel Edmonds tracking down the person who started a "Noel Edmonds must die campaign" on Facebook. The culprit was traced, naturally, to a university.
I don't like the law concerning itself with what people think or, except in certain circumstances, what they say but I think Edmonds is quite right to call out this person for being, if not actually murderous then at least incapable of finding the language that properly reflects his feelings.
He could argue that he's only parroting the language of the times. An increasing number of people see the world in binary terms, where things are either "brilliant" or "crap". The people calling things brilliant don't really think that, nor do the people calling things crap. Only by grotesque overstatement can they get anyone's attention. If this boy did want to kill Noel Edmonds he would be criminally insane. If he didn't want to then he had no more business saying so on Facebook than in bellowing it through a megaphone on the street.
I know it's all "humour" but, really, even humour is about the nuances.