Earlier quoted context omitted.
The UK's libel laws are bad, and thankfully don't apply outside their borders. For an example of why, it took multiple years, millions of dollars, and a 349 page judicial decision to uphold calling someone a holocaust denier. https://en.wikipedia.org/wiki/Irving_v_Penguin_Books_Ltd
What? If someone published a blog post titled "ceejayoz is a ", you would be well within your rights to sue for libel if the claim was not true. There is nothing "bad" about that law, it's the best way to defend yourself against sensationalism and fake news.
In the UK, the burden of proof is switched; the accused must prove their statement was truthful, which means an expensive legal battle. If you're a well-off asshole, you can leverage this in very nasty ways.