I've left a comment on Justin Taylor's blog, on the post entitled Keller and Powlison: Should You Pass on Bad Reports?.
Have a look and see if you agree.
Update I: The comment's gone but the question remains—the New Testament names Ananias and Sapphira (Acts 5); Peter (Galatians 2); Euodia and Syntyche (Philippians 4) and 'Cretans' (Titus 2:12), and a number of individuals in 2 Tim 4. Then in the gospels we have Judas, Peter, and all of the disciples in one way or another shown up as betrayers, spineless, proud, inconsistent, hypocritical and foolish. In each instance, and more, bad reports are passed on for the benefit of readers. So the post by Tim Keller and David Powlison is a useful reminder, but flawed because it is selective in its attention to the biblical evidence.
Update II: Lisa in the comments for this post points to a useful discussion on the 9 Marks blog, covering similar ground.
Update III: Justin Taylor has just kindly sent me an e-mail letting me know that no comments were deleted. So any comment of mine or anyone elses that disappeared can be blamed on the evil technology demons!