Censure vs. Censor

So my oldest son asked what the difference is between censure and censor.  Interesting question. 

Dictionary.com lists "censure" as a noun meaning: 
1.strong or vehement expression of disapproval
2.an official reprimand, as by a legislative body of one of its members.
 
"Censor" is listed as noun


1.an official who examines books, plays, news reports, motion pictures, radio and television programs, letters, cablegrams, etc., for the purpose of suppressing parts deemed objectionable on moral, political, military, or other grounds.
2.any person who supervises the manners or morality of others.
3.an adverse critic; faultfinder.

 
So, i've been thinking alot about First Amendment rights.   The First Amendment to the United States Constitution reads:  "Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances."
 
For instance; you can call whatever you like art, however some people may find it offensive, in bad taste, or just plain bad.  I have to admit I don't have much of an eye for art; although I love to look at sculptures, paintings and photography.  Most of it (even if I could afford it) I wouldn't put in my home.  Some people find the Micaelangelo's statue of David offensive for it's nudity.  Other's might think Andy Warhol's art is irreverent or odd.  But people allow the statue to stand and the art to hang where it is because it's someone's interpretation of art.  You are free to look, enjoy and critique.  Or not.  You are NOT free to destroy or vandalize. 
 
If you disagree with specific politics; it is acceptable to write a letter or call your representative or congressperson and make your voice known.  You are permitted (with appropriate documentation) to picket or protest a decision or march in the streets for victory over a vote or the passage of a bill.  It is not acceptable to toss projectiles through windows or shoot up buildings to show your displeasure or joy.
 
You might signify your lack of support for something by withdrawing your money or shopping somewhere else that more closely follows your thinking.  You might change churches or schools to more closely align yourself with people who are on the same path.  You would not (at least I wouldn't) stop paying your mortgage or taxes or insurance because you think rates are too high or your coverage too poor (or don't agree with how the money is being spent).
 
You can disagree with someone's religion or ethnicity or opinion in your own living room, by shouting at the television (but not shooting the television) or cheering for the bad guy in a scary movie.  You cannot burn a cross on someone's lawn or paint a swastika on someone's door.
 
For years the media and authors and the public have disagreed on just how far the freedom of speech and press and religion should carry.  George Carlin's "7 Dirty Words" is hardly understood by many youngsters now as so many of the words are now allowed on the airwaves.  Our own Vice President used #3 within hearing range of the press -- several times.  Should authors and artists and regular people be allowed to say anything they want without getting in trouble?  How much is too much?  When is what you say in public not really appropriate to have been said at all?  And the internet and social networking sites bring the fracas to a whole new level of complication.
 
At what point does joking about killing your spouse turn into hate speech?  When does the laugh track on 'Achmed the Dead Terrorist' stop being funny (sorry, I don't EVER think it stops being funny, but that's just me).  When is nudity art and not pornography?  Who decides when one (or more) religion or politician is okay to poke fun at, but some you just have to leave alone?  And, if I laugh at a joke or a comment that someone else doesn't find funny, does that make me wrong or sick or bad? 
 
So, is it okay for others to censor our opinions, beliefs, rights, our sense of humor?  And at what point does censoring our freedoms turn into legal censure?