Thailand is a great country, but some of the laws and rules in Thailand are different from other countries. When you visit Thailand, follow the rules. Period.
Last week saw a ruling against a webmaster regarding comments on a website- the comments defamed the royal family. The website did not author any of the comments, but failed to monitor responses to an article–the responses contained the defamation. The webmaster was sentenced to a jail term, though the sentence was suspended.
This means you could be held responsible for comments that someone makes on a web property that you own or administer–like Facebook. Please understand the laws and rules before you visit Thailand to avoid any issue, someone writing improper comments on your Facebook page could land you in trouble.
Google had a very strong- and negative- reaction to the ruling of the case: http://googlethailand.blogspot.jp/2012/05/threat-to-potential-of-thailands.html
Please follow this link for a very good summary of the case: http://thenextweb.com/asia/2012/05/30/thailand-hands-webmaster-suspended-sentence-in-landmark-royal-defamation-case/?awesm=tnw.to_1Ec2j&utm_campaign=social%20media&utm_medium=Twitter%20Publisher&utm_source=Twitter&utm_content=Thailand%20hands%20webmaster%20suspended%20sentence%20in%20landmark%20royal%20defamation%20case