Pretty interesting read over at the WSJ about the Internet to Iran, and how they are blocking/censoring/inspecting packets: Iran's Web Spying Aided By Western Technology.
I was a bit appalled at the fact that the Siemens and Nokia joint venture that created the solution for the Iranian government to do DPI on the entire Iranian Internet connection. But as the article quotes from a spokesperson for the joint venture, they made the decision to sell the product (which was apart of a larger contract to provide a mobile network) based off of the idea that they would rather provide the ability for Iranians to communicate than not at all.
I suppose that decision is probably the correct decision (or lesser of the two wrongs). Considering that DPI isn't a perfect technology, and can often be easily circumvented, maybe they're (Siemens/Nokia) not so bad after all. Maybe knowing that fact is how they are able to sleep at night.