>Let me clarify.
>
>I want to prevent someone from
>using a table at all, shared or not.
>
>I was thinking of modifing the header
>if the table with low level file
>functions, but I wanted to see if anyone
>else had any experience doing that.
>
>Thanks

Why not to ask your system administrator to prevent this user to access particular folder/file? At least, it's more reasonable solution then hacking table header.