I think the insanity plea is abused and everyone tries to get evaluated as an easy way into a lesser sentence. I am not for ending the insanity plea, but I am for reforming it so that it cannot be easily abused.
Tired of elections being between the lesser of two evils.When the debate is lost, slander becomes the tool of the loser. -Socrates
"With me everything turns into mathematics."
"It is not enough to have a good mind. The main thing is to use it well."
"It is truth very certain that, when it is not in one's power to determine what is true, we ought to follow what is more probable." -- Rene Descartes
edit: Here's a better link, courtesy of Spud: Insanity: Myth or Fact
I don't think we should end it, but I do believe that the trial of anyone choosing to plead insanity should be very different than a normal case. The trial should not be about whether the individual committed the act. The insanity defense should be required to contain a stipulation that the individual DID, in fact commit the crime of which they are charged. Instead the trial should focus on whether or not the individual is a permanent threat to society or only an occasional threat to society. If found to be an occasional threat to society, the individual should be institutionalized for life. If found to be a permanent threat, they should be immediately executed.