Sometimes employers overreact, too.  The firing of Mozilla CEO Brendan Eich for donating $1000 to Proposition 8 - the anti-gay marriage proposition - is a clear example.  CEOs are still citizens, and have all the rights of citizens, too.  

I would argue that the termination of Shawn Simoes, the Hydro One cheerleader of the famous "f*** her right in the pus**" comment also probably counts.  The courts thought so.  Hydro One was forced to rehire him.  Reality is it is hard to fire employees for being jerks while they are not working.