To me it's either a like or a hug. If it's a situation that is bad I'm giving the girl a hug versus a like. So I guess it just depends on the mind frame of the person doing it.
This girl posted about her BF telling her to shut up, and 5 ppl liked it...😳 @alye27 what's there to like about a pregnant girl being told to shut up.... Or anyone for that matter, being told by their SO to shut up.
I consider a like to be more of an acknowledgement that I saw your post and actually read it, or if it's a picture I actually looked at it, a sign of support, etc. not so much that I "like" it, even though in most cases I do.