For anyone who wants to read and print the documentation, but is against installing software from companies who secretly track customers private data(adobe), there are open source alternatives.
“jPDF Tweak” is a java based, GPL licensed editing tool that can be used to do many things to manipulate pdf documents (remove encryption, changing page sizes, merging multiple documents, converting to n-up.) This is very helpful for preparing documents for printing.
“Sumatra PDF” is fast, compact and GPL licensed pdf reader. This is very helpful for viewing and printing documents.
Maybe in the future FIRST will stop forcing us to rely on closed source software, but for now, this is one more part of the competition that can be done with open source.
If you’re talking about Finder, Leopard shows a preview of a white page with a lock on the decryption test. I loaded it in Preview.app, where it showed a red screen prompting me for the password. Once entered, the PDF appears as normal until you close the window; this worked the same way on Tiger.