The slacktivist explores the reasons behind the fish symbol and tacky Christian t-shirts. They are much less prevalent in Madison than they were in Greenville, but still. He comes to the same conclusion I did, that they are not so much tools of evangelism as they are symbols of an in-group, and that what mattered was public identification as a Christian, rather than Christ-like behavior.

A Roman Catholic perspective on this topic.

This puts me in mind of a student I had once who seemed to have a different t-shirt with a catchy Christian theme for every day. On the other hand, he couldn’t be bothered to actually read the Bible we were studying in class that term.