Prufrock
Arbitrary Moderation
Ben, I realize I'm jumping unto this dog-pile a little late; and also, I've never participated in an apologetics thread before, so sorry if I'm rehashing something that's been covered ad nauseum: but I think the answer to your question is not a simple yes or no. The best answer I can think of is: It depends on what you're trying to do with it. Questions like this demonstrate the importance of not divorcing apologetics from its larger systematic theological framework. Our faith, while being most reasonable, is not based upon reasonable proofs; the claims regarding God are accepted by faith, and the applicable claims are then confirmed, ratified and supported by reason. Natural theology is important for us, but not as the foundation upon which our faith or belief of God rests. So, if you're using "classical arguments" to either 1.) Affirm one's faith; or, 2.) Demonstrate the reasonability of the faith (within a properly established presuppositional framework, of course) to those outside in defense of the faith, then "classical apologetics" is great. If it is being used in an autonomous manner, such that the conclusion of natural theology is a necessary a priori for faith, then it is being used most improperly, and in some sense could be linked with a form of a Pelagian-style religion.