Lése-majesté, or insulting the king, is a serious crime in Thailand. Hence Google’s agreement to block Thai users from viewing videos on YouTube (owned by Google) that mocked king Bhumibol Adulyadej, including one that showed him with feet on his head, a symbol of degradation to Thai Buddhists.
– Extracted from “Don’t be evil? Where Google still censors”, CTV News, 24 January 2010.
Back in 2007 this topic was discussed on New Mandala in some detail. These posts from the archive (here, here and here) make for interesting reading.