Protecting .swf files

This link has an interesting article about protecting your .swf files. We all know that you cant really completely protect your .swf files, and i have never met a .swf i can't crack. But there are a few good points about how you can make it more secure, and what NOT to put inside it.

http://www.gotoandplay.it/_articles/2004/04/swfProtection.php