Broadcasting Your Life

Not owning a TV for a long period of time isolates me from TV news. If something is burning I will eventually find from the radio or online, but I skip the noise from TV. The curious thing is that all the people I know on Facebook are never re-broadcasting TV news, they are only publishing their own lives and stuff happening/ lived, photos from events, articles and books red. Is it because the content is hard to be retransmitted, not being available online or the fact it has a poor quality?
Later edit:
And then I discovered TNN, Twitter News Network.