Even if it's not satire though, I think it's totally misusing the word libertarian -- in the libertarian circles I've seen, they all think government spying on them is bad too and are just as paranoid about it as that article is.
The word Libertarian isn't used much outside of US politics, and if it is, it's generally relating to something different. (Just like the word "Liberal" has three different, equally incorrect, meanings in Australia, USA & the UK.)
Here in Australia, 99% percent of the time its used in the term "Civil Libertarian." Generally, this is the token walking-strawman wheeled out to give the illusion of balance for news stories about the government being TOUGH ON CRIME or similar.
If they do have some notion of the American political party, its generally imagined as some sort of bizarre clandestine gathering of billionaire oil-tycoon types that are all to the right of the republicans.
It wouldn't surprise me if it were similar in the UK and that this author refers to the latter stereotype. Which would sit nicely with the neoconservative conspiracy theory.
That said, this article is hilarious.