stopping docs from being printed

If you post documents on the web in PDF format, you can (with Adobe Acrobat) specify several things. You can either produce a 'watermark' on the document (when printed) that states only the online version is the most current (etc.), or you can block certain parts of the document (such as signatures) from printing, which may invalidate the document, and you can specify on the "watermark" that documents without signatures are not valid.

This product has many 'security' related features, such as electronic signatures and authorization, etc. Have a look.

Good Luck.

You must get management to go along with this, but...

Post a warning at the top of the page or in the beginning of the document stating that anyone who is found with a printed copy of the policy or a copy of the policy on their hard drive, they may be subject to termination. Furthermore, explain that it is a security measure, blah blah blah (you know this part).

Then, stay good to your word. The first time someone is found with a copy, have them terminated for it. Others will either destroy their copies, or will be willing to be fired.