I thought I should report that a letter in the Bangkok Post this week reported that tasers are now available from street-vendors in Pattaya. Of course knives, knuckle-dusters, replica guns etc have long been available - but this new weapon is more frightening.
So if you feel a debilitating, crippling shock: be comforted that they probably only want your money, and not necessarily your life (unless you have a heart condition).
Wikipedia: A Taser is an electroshock weapon that uses Electro-Muscular Disruption technology to cause Neuromuscular Incapacitation and strong muscle contractions through the involuntary stimulation of both the sensory nerves and the motor nerves.