Regarding Rick Warren's Son

This is probably the best web page on the subject: Triablogue: Perseverance and suicide.

Notice that in the comments section someone mentions the Scripture that I would also mention in discussions where it is denied that suicide is an “unpardonable sin”: 1 John 3.15.  With that said, my thinking is that a person would have to work to prove that any Christian who has considered suicide was in fact regenerate when he died; any Christian who has died in this way would have done mental and logical gymnastics to work around the problem of ending his life without intentionally killing himself: something which can be done though presumably no one commits himself to such a project before he puts himself to death.