it depends on the event. it makes me sad to see stuff like the bombing in boston, but I don't get "sick to my stomach." I mostly get angry that humans are so shitty. newtown literally made my stomach turn. I cried real tears. if you have kids that age, I guess I'm not sure how something like that doesn't upset you on a deep level.
I don't get the facebook posts though. 99% of the people commenting on facebook don't know anyone directly affected by the particular event they are commenting on, so I guess I don't understand why they feel a need to "send thoughts and prayers." I mean, if praying is your thing then just pray...you don't have to tell all of your friends that you're praying.