U.S. Gambling Law

Henry Lanman over at Slate offers what in my lay view is a pretty good summary as to where the United States stands in regards to its pursuit of international internet gambling prohibitions. I have been aware of the WTO ruling in favor of Antigua for a couple of years, but until the port security bill (now a law) passed the U.S. Congress was unaware of what retaliatory measures the island nation would be able to take. Lanman suggests (and I've heard it argued but can't find the source) that it is conceivable that Antigua would be allowed to ignore intellectual property rules. Can anyone give me an example of when the WTO has allowed this type of retaliation in the past?