I don't think that everything "non-productive" is "wasting time", but wasting time is by definition not productive. It's the difference between sleeping so you

I don't think that everything "non-productive" is "wasting time", but wasting time is by definition not productive. It's the difference between sleeping so you can be awake and putting yourself into a dreamless coma because you can't think of anything better to do. Watching TV (and not having it play in the background while you're doing something else) is the equivalent of a coma.