I'm an academic so reading is my job.
It's also a hobby, though. And something I do when I'm filling in time. Mostly different kinds of books but there is overlap.
But I agree with you, Caz, that you shouldn't put hobbies on your CV unless they are supposed to demonstrate something about your suitability for the job. If someone had a special section on their CV for hobbies and filled it with stuff as vague and irrelevant as 'reading' or 'spending time with friends', I would assume they didn't know what CVs were for.
But having said that, I once helped a younger relative apply for a programming job (which he got). I had to explain that his CV needed to match the job spec, and then made him transform the 'other interests' section into a section about how being in a band meant he had all this knowledge of software, social networks etc. that the company was looking for, but which hadn't been covered in his degree, so we couldn't put it in the qualifications section.
Edited: 10/03/2013 at 14:09