C. Michael Patton, in his blog Credo House, lists 14 examples of really bad apologetics: 

I strongly believe that you and I are to be clear when we present the Gospel and intellectually compelling when we defend it. Apologetic sloppiness and intellectual laziness is not an option for the Christian.

See the list here: http://www.reclaimingthemind.org/blog/2009/02/14-examples-of-false-apologetics/