Insulting the Thai Royal Family is an offence in Thailand that is punishable by up to 15 years in prison.
(Anyone can make an accusation of insulting the monarchy and the police are duty-bound to investigate and the Thai justice ministry has recruited volunteers to patrol cyberspace. Thank goodness I can insult her right royal Majesty, our illustrious leader David Cameron, and anyone else it pleases me to lampoon. I guess they don't feel they are so insignificant or powerless that they they need such protection.)