I think it's awkward to 'like' bad news. Like it felt funny 'liking' the fact that my cousins husband had passed away or that my friends mother had moved to hospice care. I mean you don't like to hear these things, so why 'like' them? But you DO want to show your support.
I'm not on FB much at all. I've an incredibly busy workload this year, as I've taken on 4 new courses and of course the children want my time as soon as I get home in the evenings - I'm barely keeping up with the Border! Anyway IMHO it's where my real friends are and it's my #1 social network!