You're right, SilverShadow, that Canadian law is very similar to British law in many ways, and to a certain extent and in certain areas of law, English case law is considered persuasive authority - but not binding authority - in Canadian courts.
However, there are many differences in various areas of law between the two countries as well, and one of them happens to be in the area of libel law. Canadian libel law is
fairly closely aligned with English libel law, but English libel law is more plaintiff-friendly than Canadian libel law, and Canadian libel law is, in turn, more plaintiff-friendly than U.S. libel law.
I've previously posted some of the basics of Canadian libel law in a thread about the Loose With the Truth video. See, for instance,
here,
here, and
here.
When content is posted on the internet, a person may choose to sue in a country where the libellous content has been viewed, rather than the country in which the plaintiff resides or where the plaintiff himself viewed it, so as to take advantage of the more plaintiff-friendly libel laws of the other country. (If memory serves, the seminal case that made this change as a result of the internet was a 2002 Australian case of Dow Jones v. Gutnick as it redefined the essential element of "publication" from referring to where the content was uploaded to including where the content was downloaded - thanks Aussies!)
That's why people often choose to sue in England for libellous content on the internet, even though they live elsewhere and even though they may never have personally been to England before.
That said, I doubt that Gravy would go to the bother in this particular instance with the Looser cretin's silly little myspace page. While the page may qualify as libellous of him, odds are that the Looser behind it still lives with his parents and has no assets to satisfy any eventual judgment.