no i do not force myself to laugh.. I usually look at them with a strange face.. like WTF? or I say " real funny" in a very flat sounding bored voice, so they know I didnt think it was funny.
Doesnt matter if its a boss or a teacher or Undead Elvis.. I do not pretend to be amused.
And yes.. I do get a bit annoyed when others pretend to be amused.