Been playing my first games this week. In an early game another played chatted "friendly until 3pts" - I wasn't fully sure what it meant but then the robber got moved between desert and 12-spot (affected no-one) by the other two players and I grasped what was happening.
Another game, nothing was said, but early in the game one player moved the robber from desert to 12-spot (again, affected no-one), and later I moved it back to the desert. Then the third player moved the robber to a spot that impacted the other two players and it was business-as-usual for the robber!
Another game, nothing was said, but early in the game one player moved the robber from desert to 12-spot (again, affected no-one), and later I moved it back to the desert. Then the third player moved the robber to a spot that impacted the other two players and it was business-as-usual for the robber!