So it's a matter of tinting? I thought it's more than that, some
sort of
polarized glass? If it's just a matter of tinting I wonder why they
wouldn't even quote me.

Or may be they thought I was talking about this:

http://www.polytronix.com/privacyglass.htm


If you're just looking for privacy, you can also get decorative window
films. They make mirror type ones, patterned like crinkly looking ones,
and decorative stained glass looking ones. For privacy, what about glass
block? That would take care of the privacy and sturdiness factor. I
currently have transparent textured contact paper on my bathroom window,
as a do-it-yourself privacy measure. It lets the light in, but doesn't
let you see through from either direction though.