Expert opinions on Disk brake spindles

First of all I wasn't certain this should go in the brake section or the steering section, but since it's one of the major components to a brake upgrade I figured this was the better forum. Now, my question for the experts is, looking at these pictures of the spindles. Can y'all say that they are safe to use or are they shot? Because the one looks pretty well chewed up a bit...the other one's not so bad. Let me know what you fellas think!