Considering he made his name with the biggest leak of secret government documents in history, you might imagine there would be at least some residual concern for Julian Assange among those trading in the freedom of information business. But the virulence of British media hostility towards the WikiLeaks founder is now unrelenting.

This is a man, after all, who has yet to be charged, let alone convicted, of anything. But as far as the bulk of the press is concerned, Assange is nothing but a "monstrous narcissist", a bail-jumping "sex pest" and an exhibitionist maniac. After Ecuador granted him political asylum and Assange delivered a "tirade" from its London embassy's balcony, fire was turned on the country's progressive president, Rafael Correa, ludicrously branded a corrupt "dictator" with an "iron grip" on a benighted land.

The ostensible reason for this venom is of course Assange's attempt to resist extradition to Sweden (and onward extradition to the US) over sexual assault allegations – including from newspapers whose record on covering rape and violence against women is shaky, to put it politely. But as the row over his embassy refuge has escalated into a major diplomatic stand-off, with the whole of South America piling in behind Ecuador, such posturing looks increasingly specious.