How could they feasibly provide this? They would need to provide for essentially everyone that has a computer, and anything they did provide would be filled with people asking things like "my mouse is broken, how do I fix it?"
Anyone who uses spamassassin, look at the X-Spam-Status header in a message, it could be that terse:
X-Spam-Status: No, hits=-100.7 required=3.0 tests=BAYES_20,HTML_MESSAGE,USER_IN_WHITELIST autolearn=ham version=3.002005
Which is much better than "too many points".
Adwords is not an intuitive service.