Love him, hate him, or just find him plain confusing -- you have to admit the guy inspires some terrific takedowns of his work:
That there should be this isomorphism between Žižek’s thinking and contemporary capitalism is not surprising. After all, it is only an economy of the kind that exists today that could produce a thinker such as Žižek. The role of global public intellectual Žižek performs has emerged along with a media apparatus and a culture of celebrity that are integral to the current model of capitalist expansion.
In a stupendous feat of intellectual overproduction Žižek has created a fantasmatic critique of the present order, a critique that claims to repudiate practically everything that currently exists and in some sense actually does, but that at the same time reproduces the compulsive, purposeless dynamism that he perceives in the operations of capitalism. Achieving a deceptive substance by endlessly reiterating an essentially empty vision, Žižek’s work—nicely illustrating the principles of paraconsistent logic—amounts in the end to less than nothing.
Though, in fairness, someone likes Zizeck's value exists primarily in challenging assumptions (like, for instance, the idea that we can totalize a thinker in a sentence -- whether that be Gray's or mine).  Regardless, Zizeck responds with typical gusto:
It is Gray’s work which fits perfectly our ideological late-capitalist universe: you ignore totally what the book you are reviewing is about, you renounce any attempt to somehow reconstruct its line of argumentation; instead, you throw together vague text-book generalities, crude distortions of the author’s position, vague analogies, etc.—and, in order to demonstrate your personal engagement, you add to such bric-a-brac of pseudo-deep provocative one-liners the spice of moral indignation (imagine, the author seems to advocate a new holocaust!).