Whilst discussing America is a bit off-topic I'm just stating that I think we should follow their lead in this much more closely. It's easier for them, obviously, as they have the Bill of Rights which offers much more protection and sets out what can or can't be done (to an extent, courts interpretation is obviously the determinant factor).
I disagree, yes you shouldn't be able to falsely shout such a thing out (the Sup. Court made specific mention that it required to be a false statement) but stating something shouldn't be illegal if it has no probable or reasonable danger of occurrence. Hence the current test in the US - "In each case [the courts] must ask whether the gravity of the ‘evil’ discanted by its probability, justifies such invasion of free speech as is necessary to avoid the danger.”. I don't believe that the crime in question, at least with the facts present to us, is of such high enough gravity to warrant such a stiff prison sentence.
Another area of US law that springs to mind is the following quote from Texas v. Johnson - "If there is a bedrock principle underlying the 1st Am/dt it is that the government may not prohibit the expression of an idea simply because society find the idea itself offensive or disagreeable." I think that's an important quote as it really goes to the heart of the issue and provides reassurance that just because something is potentially offensive doesn't make it 'wrong' to say so.