You should have posted this in the LFSLapper section.
However.
I don't know if you can hide them (unless you give them names no-one else likely to use or guess - like instead of !top, you have something like !thebestestfastestdriver).
Another way is to stop anyone but Admins using them, such as;
In above example, if you're an admin, then the !node command will get you an answer (a number), but non-admins get a message advising they're not admins so command won't work for them.
Just make sure the people you want as Admins are in your admin.txt file.
Basically, this means unless I typed !test, nothing would happen.
So. Assuming your version of lapper is using the Register MsgAction in front of the ! commands, you just have to add the $allow = line underneath the Sub command with your nickname for you to effectively "hide" the commands.