Well, I have not seen the movie Tropical Thunder but I have noticed that there have been several protests because they used the "R word" for mentally challenged people in the movie.  I do understand that that word is hurtful to people who are mentally challenged.  My own son has been hurt by people calling him that. 

I just wonder if people take offense to easily or take things too far.  I can understand walking out of a movie that offends you.  I don't see why you have to try to deter other people from seeing the movie.  Sometimes a joke is just a joke.  When does it go too far?  I don't know?

Sometimes it's hard to be sensitive to others feelings but still have a sense of humor.  I have to say that if someone uses that word to describe someone who ISN'T mentally challenged, it doesn't bother me.  If they call someone that who is mentally challenged, then it's just plain mean.