We've been having a string of griefers come through setting entire plots to chests. If we disallow griefers from using chests in worldedit, that prevents users from copying their houses around. Not cool. We need a weird, custom solution for this.To prevent this from continuing, I want to make a plugin that does the following: 1. Let user perform their command. 2. Check the blocks changed. Check out ratios of laggy blocks to non laggy block, or just if anything should be considered malicious or dangerous. 3. If ratio is off, notify all staff members. Prevent the worldedit command from completing. Deny any changes to the world. Warn the user about the actions taken. Perhaps also temporarily remove their worldedit permissions. I need help with part 2. Any ideas on which part of the API to use? Any example code? Thank you in advance.