I don't ever remember being told outright to stop reading, but my father (who's from a very small village in Punjab and wasn't really exposed to books that much) always criticized me when I had my nose buried in a novel for hours on end. I ignored him, and kept reading
I wish my boys were readers. They both struggle with it and I hope with practice they learn to at least like reading. Even if I can get them into comic books, it's better than nothing.