The message, a rant about the Police and Crown Prosecution Service, finished off with, "P.S. — D.C. Lloyd, God help your new-born baby". Apparently "any reasonable person would find the comments menacing." — perhaps the magistrate isn't aware that any reasonable person who has spent more than 10 minutes on the internet has figured out that 99.9% of what's posted on blogs is bluff & bravado. Disturbing that a magistrate considers a 0.1% chance that the defendant was serious to be more important than his right to free speech for the 99.9% chance that he wasn't.
Unfortunately, the original blog posting has been removed, so we can't judge the context for ourselves.