There is an increased concern about terrorism risk in the whole of Southeast Asia, including Thailand. Caution is advised, particularly in places and venues frequented by tourists and on public transportation.

Because of political unrest, travel to several southern provinces, including Narathiwat, Pattani, Yala, and Songkhla, is currently advised against. Arson, bombings, and killings have taken place irradically since January of 2004. Travelers to rural or remote areas should be accompanied by a guide, who can prevent accidental border crossings 

On a less life-threatening scale (for the most part), travelers to Krabi, should exercise caution when approached by anyone attempting to sell gems, or to refer you to gem dealers. Over a thousand reports a year are made by visitors scammed by fraudulent gem dealers. Credit card fraud is also on the increase.

Though violent attacks on tourists are rare, pickpocketing and purse-snatching, especially in crowded, touristy areas, is not. Tourists have been known to have had unattended food and/or drinks drugged for the purpose of robbery while on trains or in bars. Finally, as unsavory as it is to mention, the prostitution industry is alive and thriving in Thailand, and women are not held in high regard. Though foreign women traveling in Krabi are relatively safe, it's still wise to take precautions: dress conservatively and avoid night travel alone.