When you get to the stage of monetizing the site, I expect the most obvious starting point is monetizing the information inside the pdfs.

Then there's the obscurity of how much (if any) is passed on to other services (like google). You may have one policy about the PDFs, they may gave another.

So yeah, I'm in the "not for general use" camp myself. (Although there are edge cases where it may be useful.)

Don't get me wrong, I can see the upsides, and your web site looks professional, but alas the downsides are too significant to overcome the inconvenience of searching out something local.