No server is cheater free, i am proud to announce that cheater levels on my servers are the lowest in the community, hands down.
Besides EAC, all my servers have a second custom layer of protection against these half twits.
I constantly monitor all servers for suspicious kills, F7 reports and /reports, and i investigate every single one in a timely manner.
If you suspect someone is cheating or glitching, press F7 while in game and report.
If you have compelling evidence such as a video clip or screenshots, simply put in a ticket and i will investigate.
I recommend Obs, its a light weight, record on demand, free software, you can download it for free at http://www.obsproject.com
In my experience, if someone is cheating, they will get caught either by EAC or me.