The Fourth Circuit overruled a lower court decision and found that "liking" a candidate is protected free speech.  A public sector employee "liked" the losing candidate for Sheriff.  The winning candidate then cleaned house of his opponent’s supporters.  He fired the "likers,"  See ABA Bar Journal report.  But, now the appellate court has overturned the lower court.  The Fourth Circuit noted that "liking" someone on Facebook is the same as typing out the words of support.  See Workplace Prof blog post.  

Yea, no kidding.  I wonder if  the lower court judge has a Facebook account and knows what "like" does on FB…..