One of my pet peeves is the use of the word "Christian" as an adjective; i.e., Christian business, Christian radio, Christian movie, etc . . . . used to describe a person or a group of people is a little closer to acceptable, such as Christian author or Christian band, because Jesus did not die to redeem your business or your radio station, he came to redeem you and me. "Christian" is a noun, a person, not a descriptor for an inanimate object.
I understand the need for shorthand at times, and certainly fall into it myself, but I think it's something we should be cognizant of and make sure we're using the word properly.