Update:
Today I figured out that clicking "like" on another person's post is not a kindness but instead an act of trolling. A "liked" post can no longer be edited. This is probably done to prevent people from having the object of their liking changed to something they would not like at all. The real world application of this though is far more sinister: by "liking" posts, the likers prevent the poster from correcting spelling mistakes and typos, preserving them for posterity.
So next time one of your posts is "liked", be not too hasty in thinking there are kindred souls on the internet. Chances are you had made a typo and are now victim to a gang of typo-preservists.