And to clarify, that's actually the '!spec' command that you're talking about. It's when the player is in spectator mode, roaming around the map, and you are able to see their trail if they have it turned on. '!nolcip' is something else; it's similar but used for an entirely different purpose. You mentioned some admin using it to locate you and find your location, but as far as I know, among the admins who are online daily on the server, none of them has their trail ON except Alex, and he would never do such a thing.
Getting back to the '!noclip' command, you mentioned having experience on other servers where the situations were more complex, yet you don't know this, and that's our whole point of suggesting newbies to give more time to the server and the community.