How about three buttons:<p>&gt;I agree<p>&gt;I disagree<p>&gt;This is spam<p>The total votes in the first two are used in the ranking, but then you also get &quot;recommended friends&quot; based on who else has agreed with what you&#x27;ve agreed with, and &quot;advocated devils&quot; based on who disagrees with what you agree with. These two groups are then used to alert the user to comments made by these people, which may indicate a discussion worth joining.