The problem isn't the medium, it's the message.

I don't think there is anything inherently wrong with TV. In fact, I think the opposite. It has amazing potential to educate, inform, illuminate and, yes, entertain. The thing to remember is you have control over it, it doesn't have control over you. You choose what to watch ( filtering out the crap) and put limits on how long you'll watch it and there shouldn't be a problem.

Of course though, it's up to you