First, I think it's up to parents to make these decision for their own kids.
For my kids, I don't want them watching much TV, and definitely not under the age of 2 as I understand it can affect brain development detrimentally. However, DS did watch it under 2, though only very little, as I have found it a very useful way of getting things done. So compromise. Since I was pregnant with DD and even more so since she was born, DS has been watching more. He informed me recently that TV was his most favourite thing in the whole world
I dont' like having tv on all the time and we restrict our own viewing as well. I'd like to say that I do constructive things instead, but I'm not sure that BB etc really counts
So I have certain ideals and then there's the reality