This plugin is perfect for PvE. As stated in the description, the call-out system is there, but there are always a few bad apples that don't abide.

With this plugin, you'll never hear "I was here first or Thief!" again!! The functionality and customizability of the config is great. Rustonauts has also been quick to respond to any questions/concerns. 12/10 recommend for PvE server owners. 

Amazing plugin. I really love this plugin to lock monuments. I am using this in my PVE server, I love it.  I try to find this type of this plugin for the last month, now I found it.

My self and the players on my servers love this plugin!! I use it on my PVE servers and its the best thing I have used. Players are able to loot monuments without others being able to come and loot at the same time, also prevents players from stealing. If you haven't already got it you should definitely try it.