Our server cannot use this mod because of this "cheat". Our server is completely vanilla; no mods, no plugins, only Optifine. We want to make a great video, but we can't.
One way to disable the cheats, is to let the camera not go through blocks when setting the keyframes. It means the camera should have a hitbox. Of course, when the path is calculated, it may go through blocks, so just make it so that the screen will completely black out. If the player was going through a block in a preview and then exited out, the camera could go to the nearest air block, or to the nearest player. It's not a completely cheat disable, but it is better than nothing.