"Are you sure you wish to perform this action"
Uh....no, but let's go ahead anyway and see what happens....
Well, how about improving the message in a way where it says :
"Are you sure you wish to perform this action even though it will decrease your Spellweaving skill by 100 points ?"
Had the message told me that, chances are that I would have stopped right there.
Instead, because of a number of issues and being tired the fact that I had marked down spellweaving slipped out of my mind.
A message reminding me of that would have been of GREAT help to me like to many other players who like me where unfortunate to have this accident happen to them.
When a system CAN be improved, and it CAN help players ease their pain and frustration, I do not see why it should not get improved.