Apparently the UN have decided that tasers are a form of torture. The UN's Committee against Torture said that "[t]he use of these weapons causes acute pain, constituting a form of torture.... In certain cases, they can even cause death, as has been shown by reliable studies and recent real-life events".
Next week the Committee is due to report on handcuffs and fists and is expected to conclude that they can cause acute pain and so constitute a form of torture. A new campaign called "Make Fists and Handcuffs History" is expected shortly.