You can try, but almost every suggestion I've seen relies on macros. And macros
can be disabled (and events can be disabled) and that will allow your file to be
copied and printed.
The answer is that if you don't want it copyied/printed, then don't use excel.
Excel 2003 has Information Rights Management (IRM), but I have not read much
feedback on this. I believe it requires a company to have a Rights
Management Server. It is under <File> <Permission> <Restrict Permission
As..>
<...copy>
Users or groups can be given a set of permissions according to the access
levels assigned to them by authors using the Permission dialog box:
Users with Read access can read a document, workbook, or presentation, but
they don't have permission to edit, print, or copy.
<...end>