Why does a user need 150 points to vote in elections (and why not less)?
On the one hand, I can understand that people who rarely visit should not be able to skew results, and that the minimum reduces the chances of fraud.
On the other, I frequent SO quite a bit, but ask and answer relatively few questions. Many of my problems have been answered before. A good moderator would enhance my user experience, too.
Perhaps a veteran SO user can clarify this a bit for me! Most importantly, I wonder if the reputation count is the best way to measure the use of this community (e.g. one does not even have to have an account to use it).