Two of them, at least, and they don't like it. Here's Gary Wise, and here's Michael Geist. Since they both make similar points, I will let Mr. Wise speak for both:
While I understand the freedominion authors to be an extremely tempting target to many in the blogosphere, little solace should be taken from this ruling.
An order for disclosure may have been justifiable if the statements made by the anonymous posters were, on their face, apparently actionable.
The Court's disinclination, however, to engage in any factual analysis of the alleged defamation or the necessary balancing of competing interests has created a dangerous precedent that should not be allowed to stand.
Based on Warman ruling, the mere commencement of a court proceeding may now give rise to an automatic entitlement to this form of disclosure.