The amount of people I've been helping out that have copied some code from somewhere and say "it doesn't work", and who are dumbfounded when I ask them to read the surrounding text aloud for me...

Along the same line: When something crashes, and all I have to do is tell people to read the error message aloud, and ask them what that means. It's like so many people expect to be spoon-fed solutions, to the point where they don't even stop to think about the problem if something doesn't immediately work.