NOTE: This post has possible indirect spoilers for the Harry Potter series, including one that relates to Book 7.
Many fictional Dark Lords have met an untimely demise because they failed to follow the common sense rules of the Evil Overlord List. Now that the Harry Potter series has reached its end, we can determine how well Lord Voldemort followed the advice of the List. Overall, not too badly. However, he might have done better if he paid more attention to the following suggestions:
4. Shooting is not too good for my enemies.
6. I will not gloat over my enemies’ predicament before killing them.
11. will be secure in my superiority. Therefore, I will feel no need to prove it by leaving clues in the form of riddles or leaving my weaker enemies alive to show they pose no threat.
78. I will not tell my Legions of Terror “And he must be taken alive!” The command will be “And try to take him alive if it is reasonably practical.”