Here is my 2 cents worth.

I understand edwin_fredrick's point and he is quite right in brining it up. But, a scoring system is of little use IMHO. You can judge the person's knowledge from the quality of the answer. You have a choice to decide which solution works for you best. Also, I am sure if some one who does not have enough knowledge of the subject and posts incorrect/useless answers will get kicked out before he/she gets to the Guru status.

I view the star system in some respects as a token of appreciation and encouragement for the people who are helping others in need. I have found some, in the nick of time god send answers. And invaluable input even when I just browse through the days posts. I don't know how else to appreciate the people who take time to help and share knowledge.

If a scoring is decided as a way to go, then pretty soon we will have SQLServerCentral certified DBA's 🙂 What say.....