Modifying your style sheet is a one time deal, so you can cut out the artificial procedural complexity right there. Clicking on a link to an external site is pretty easy, and doesn't require any specific browser or operating system.
I honestly don't care if anyone decides to use it. After all, bandwidth isn't free for me. I just don't understand why you think it's such a big deal. I saw that people wanted a convenient feature for printing a single post, and I provided the best that I thought was possible short of modifying the forum code. Ideally the forum code should be modified, and we will have to wait to see if that's approved.