Minecraft wiki entry for Things_not_to_do, associated text: Admins and other players do not appreciate the use of X-ray mods or resource packs on their servers, as it gives some players an unfair advantage over the other players and may lead to punishment and ultimately being banned from the server! It is never a good thing to X-ray, no matter how far away the player thinks admins are because they never know where admins are and what tools they may have to catch rule-breaking players. If the server allows it, or the player is given permission on a server, then they may use x-ray mods or resource packs, as long as they turn off these resources when done with them.