One thing that is very helpful while reporting those who are breaking server rules is to create a video of them in the act. It provides a lot more insight into what's happening in a way that screenshots don't quite cover, and video evidence IS required for reports of Petra rooms being stolen.
First off, head over to http://www.bandicam.com/downloads/ and click on the big red button that says "Download Bandicam". Should look something like this:
After installing Bandicam, open it up and you should see something that looks like this:
At this point, you should be good to go. All you have to do now is switch over to your EdenEternal client and press the F12 key and you will start recording your gameplay!
You can change where the video is stored in the "Output Folder" setting on the General tab of Bandicam, change the hotkey as well as the quality settings of the video you capture from F12 in the "Video" setting tab, and turn the FPS overlay on and off in the "FPS" setting tab.
Adjusting your video settings to something that fits your PC's processing power is very important to creating a video that will fully capture what you are trying to report without causing lag while playing. Many EE players don't have high-end gaming computers, so if you aren't sure that your computer can handle recording, try changing the video settings around a little bit to something easier on your PC.
If you select the video tab...
then click on Settings at the very bottom of the screen...
You'll get something like this. This is where you can tweak your graphics settings. I'll explain each setting you may want to change as well as providing a recommended value for those with weaker computers.
File Type: it's safe to leave this setting alone.
Size: determines the resolution of your video. (Half Size is safe for most computers.)
FPS: Frames per second. (15 FPS is safe, 10 FPS is okay if you still lag at 15.)
Codec: leave this alone unless you know what you're doing.
Quality: leave this alone as well.
If you would like to disable audio so that your TeamSpeak/Skype call/Raidcall doesn't get put into your report video, you can navigate to the Video tab...
Click on the first Settings button in the middle-right of the screen...
Then uncheck the box that says "Record Sound" at the top of the window that appears.
Hopefully this should help better illustrate how to record videos for your reports (though I hope you rarely encounter situations that merit recording someone breaking the rules).