All Scripture is God-breathed and is useful for teaching, rebuking, correcting and training in righteousness, so that the man of God may be thoroughly equipped for every good work. 2 Timothy 3:16-17
There is a site out there that commonly appears on Yahoo and others that spends the vast majority of its efforts to discredit those of faith. They commonly take verses out of context and misquote the Bible to try and make their points, which is sophistry.
If you come across such sites, you can either respond in an attempt to show them the error of their ways, or walk away. I suggest for the vast majority of these sites and the people who are drawn to them, it is better for your own soul to walk away. I often engage them, but notice that they are so set in their ignorance that I would probably be more successful instructing a stone.