A US firm was among ISPs operating in Argentina that recently received orders from the country's Department of Justice to put a stop to all local traffic visiting a particular gambling website operating without a license. An anonymous source, according to Ian Lamont of The Industry Standard, has said that Deep Packet Inspection (DPI) was floated as a possible option to accomplish this task although later not implemented due to high costs.
Lamont reports: "The DPI approach would be troubling on a number of levels. First, any ISP using DPI is going beyond a government mandate to simply block traffic to a particular site. The ISPs would actually be peering inside their customers' Web traffic without their knowledge." Although DPI wasn't used in this particular case, "it will probably be considered in the future as a way to take offensive or illegal sites offline."
Read full story: The Industry Standard
Related topics: Access Providers, Broadband, Net Neutrality, Privacy, Telecom
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For example here is a CISCO NBAR config that Indonesian ISPs used to block sites serving up Geert Wilder's racist Fitna movie, based on a government order to block Fitna from being served up to Indonesians.
http://risnaini.wordpress.com/2008/04/08/youtube-fitna-cisco-regex-filter-nbar/
[and no, I am not going into the ethics debate part of this here, that's as dead a horse as you can get]