Some commentators, authors and preachers definitely do not hold a Christ-centered perspective on Scripture. There are much more pervasive effects on us. Studies show that TV violence desensitizes us to real violence and makes us more fearful of the world. Obviously, too much influence from the media will produce a world view very different from the values of Jesus Christ. Let us hasten to remember the positive impact media can have.
Images are powerful, and they are being used for Kingdom work.
Many church agencies are producing high quality media. Make use of these in your church and community. There are many sources of information for those who want to gain control over media in their lives. Start with the Mennonite Church Statement on Violence, available from the Peace and Justice Committee. While it is a secular source, I've found the Center for Media Literacy an excellent clearinghouse for resources.