I heard now several times that people were griefed by using switches to start harvesting mechanisms or luring away animals though open doors. The only way to stop that, would be to enable users to disable switches, as we do it in towny. There is an issue with that however:
In the empire, 100% of the area is covered by lots. Many of the lots have large builds or even walls. Most of the doors now are iron to keep the creepers out. If we allow blocking of switch-use, we run the risk that new users have to take massive detours to reach their lot due to closed doors.
Since the griefing is only occasional, I would recommend instead that you remove the switches and buttons that allow access to your most important assets and place them only when you use them once you see that you are a victim of griefing.
If we see that this is a more widespread issue, we can think also about alternative methods. At the same time I will see if we use a monitoring plugin so we can ban those users right away.