I agree and disagree.
Yes, it's a waste of time in the sense that none of the hard core FR creationists and evolutionists are going to switch sides.
No, it's not a waste of time because someone who is open-minded could have their mind changed. Most of the current crevo participants don't fall into that group, but we get new Freepers and lurkers every day.
And if Colson writes something, I post it, no matter what the subject.
As a 12 yo girl once said in answer to a question on this subject: In sunday school, we learn that God created the universe an all living things; in science class at school, we learn how He did it.