This document discusses saboteurs in projects and what can be done about them. It defines a saboteur as someone who wants a project to fail, change direction, or be undermined. Saboteurs do this because they care more about other things like their job, career, expertise or visibility. Saboteurs can be identified by what they say and do, like avoiding documentation, focusing on fringe issues, or questioning decisions. While sabotage is different than disagreement, saboteurs can be effective if left unchecked. The document provides strategies for dealing with saboteurs, such as ignoring those with little influence, closely monitoring task completion, helping redirect focus for those challenged by change, or replacing strongly opposed influential people.