I think that there isn't "the key", golden answer yes or no. I am a person who as a child was often alone, I was eating with tv, sometimes my parents were leaving me at home with turned on tv and as we can see (ok, you maybe you haven't had this opportunity yet ) I am normal girl now. (maybe not totally normal haha) To say more I realy not so often watch tv, I prefer good movies and watching Japanese anime on dvd /net. In tv I watch only tv news. Well, we should think a little about this what is bad in tv. And we should remember that not every child is the same and one day part of them will chose by self what's better for him/ her. :) And one more thing. If you tell to child "You musn't watch tv alone" he/she will miss it so much and envy his friends. Such situation isn't good for 2 sides. Children shouldn't watch too much tv, but programs they like and which are allowed more or less to their age...why not?? ; )