I've read a few articles on people who were fired and even arrested for "liking" a FB post ; not for leaving a comment of approbation on it , but  merely  for pressing the 'Like' option . Only a few incidents, and none of them in the USA (so far...) but the willingness of modern western societies to criminalize thoughts and attitudes, even to the point of using the legal system, is terrifying. This is not to that extreme, but it is on the continuum.