Sadly I can confirm that. This server was great for many months that i played here with my brother. There are 3 bases now (just a week and couple of days after 1.21 wipe). If You get close to any of those You get insta killed, or 2 shot while sprinting, no sound, no bullet crack, no shooter to be found. They are obviusly not hiding so it would be easy to take care of it.
Also 99% speed hacking and collecting stuff with ESP.