As Titus said, you guys could use a "reputation bar." Each council member gets to put in a Yay or Nay on whether he the member is okay in his book or not. For each Yay the member goes up a notch on the bar, and for each Nay he goes down.

And the top-ten highest reputation's get a stamp of approval or something that appears somewhere.

And the top-ten lowest rated are banned.