That may be true if DLC was censored with 'free' prefacing it also.
Based on what?
The fact that DLC is censored, and free DLC is not, isn't proof of anything. Neither of us know exactly how their censoring software works.
There are some ways of censoring words that could lead to odd words being censored like that.
EA said today that DLC is not supposed to be censored. Do you really think they would purposefully censor DLC and hope no one would find out?