Would it be as simple as adding something here:

        [ChatCommand("fmini")]
        private void FetchMinicopter(BasePlayer player, string command, string[] args)
        {
            if (!permission.UserHasPermission(player.UserIDString, _fetchMini))
            {
                player.ChatMessage(lang.GetMessage("mini_perm", this, player.UserIDString));
                return;
            }

            var mini = FindPlayerMini(player);
            if (mini == null)
            {
                player.ChatMessage(lang.GetMessage("mini_notcurrent", this, player.UserIDString));
                return;
            }

            bool isMounted = mini.AnyMounted();
            if (isMounted && (!_config.canFetchWhileOccupied || player.GetMountedVehicle() == mini))
            {
                player.ChatMessage(lang.GetMessage("mini_mounted", this, player.UserIDString));
                return;
            }

            if (IsMiniBeyondMaxDistance(player, mini))
            {
                player.ChatMessage(lang.GetMessage("mini_current_distance", this, player.UserIDString));
                return;
            }

            if (FetchWasBlocked(player, mini))
                return;

            if (isMounted)
            {
                // mini.DismountAllPlayers() doesn't work so we have to enumerate the mount points
                foreach (var mountPoint in mini.mountPoints)
                    mountPoint.mountable?.DismountAllPlayers();
            }

            mini.transform.SetPositionAndRotation(GetIdealFixedPositionForPlayer(player), GetIdealRotationForPlayer(player));
        }

I didn't realize this wasn't blocked. It should be pretty simple to add this, either as a new config option or following the same option as for spawning.

Would there be any chance of getting a snippet of what to add into this section, I have not messed around with plugins (successfully) before so wouldnt want to break the whole thing! Or would this be a option added in a future update? My players have got so used to it, but few abusing the fact they can fmini them anywhere have meant i've just disabled it for now!

Will be in a future update.