Censorship & WalMart

In order to have an intelligent debate about censorship, it is best that it is defined. Is it the government limiting free speech? Is it concerned parents not wanting sexually explicit material being used to teach their children at school (public vs private)? Is it Wal Mart choosing to not sell music with warning labels? After looking at a few sources, the consensus is that censorship is the suppression of speech or deleting/changing of materials because they are determined to be harmful or objectionable. What immediately jumps to mind is: Just who decides these things? Is it a bad thing to censor things? Sometimes? Or, as in the Wal Mart example, is it just a business decision based on the ideology of a corporation? Please, let's not dilute the debate by talking about 'feelings' or 'fairness'. It's about who has the authority to do the censoring in each example and what guides their decision making. First of all, every government censors something...even the US Gov't. While there are many examples that are far worse (Cuba, China), it happens today in our country. Is that a bad thing? If so, when does it start to become a bad thing? Regarding Wal Mart, I don't see it as a bad thing necessarily. Why? Because Wal Mart has a reputation that they want to maintain & stockholders that they are accountable to. They are a business & they can run it as they choose...as long as they aren't breaking any laws. Good for them! As far as only 'white, bible-belt conservatives' shopping there? (Lilly's words) Venture over to the Wal Mart by my house on Story Rd in SJ and you'll see many types of people shopping for their families. It seems their only concern is stretching their dollar, not about Sheryl Crow's CD.
I digress...
Censorship? Is it censorship by Lilly if she were to only assign certain chapters of our textbook? Is it censorship that the Mercury News editorial board doesn't consider hiring conservative journalists (as Joe Rodriguez flippantly stated last semester in my 100W class), or when they choose which stories to run & which not too? Is it censorship when my editors only post 25 of the 35 images I submit to them after an assignment? OR, is it just people with the proper authority attempting to use their judgment in the best interest of their company & customer? Before we start throwing around the 'censorship' accusations, I again, request that you leave out your 'feelings'. They don't apply here. Otherwise almost everything could be considered censorship and it only negates the real examples of it. It also begins to sound McCarthy-esque...know what I mean?