Re: Testing boundaries
I believe historically your comments regarding the dwellers of this green and pleasant land would have been ignored, shrugged at or (more likely) entirely agreed with.
Defamatory or not, they're not going to cause a level of offence that (again, historically) might have, for instance, led to the invasion and subjugation of your homelands.
At the same time, if you were to impugn the reputation of an individual then yes, that may well provoke an appropriate response.
Google may also link to your derisory view of that individual, but in so doing would be merely pointing out 'over there is something said about someone', which I believe is different to Google saying it about them.
Of course, this being the Internet Australian and UK law are mere nodes within the virtual landscape. That's where life does however get complicated, and is why the US has the 2010 SPEECH Act to protect Americans against the laws of other countries.
I'm not sure any of this forgives the horrific insult you threw at our poor hosts. I refer you to Wesley's polite rejection of Montoya's initial proffering of his word.