THEY DON’T ALWAYS WORK
When asked about the effectiveness of Tasers and stun guns, a corrections officer I know said that they do work but not to count on them to be effective every time.
Heavy clothing can keep them from working— but that isn’t the most significant problem.
The worst-case scenario is also the one in which you really do need it to work every time; and that is when someone is high on drugs and doesn’t have the normal reaction to pain and electrical shock. When they are that high, they can develop a superhuman kind of strength and resistance against which stun guns,
Tasers and other measures are ineffective. So, remember to have your plans B, C and D ready in case you need them.