Nope. Further, file names can always be seen in the page source code, or in page URLs for image permalinks. We use them in a few other places throughout page building, and regardless what we do, search engines will always see your file names and factors them into SEO.
To wit, you shouldn’t be putting private or sensitive information in your file names. And that’s not Backlight-specific advice; it’s just how the Internet works.
I recommend not using client names in your file naming; instead, use them in folder names in your library, or add them to image metadata.
My personal file name convention is this:
The “mc” is my initials. I then use the date and time for ensure unique file names throughout my entire catalog. If I’m shooting rapid burst – multiple shots per second – then I might also add a sequence number following the time, again to ensure unique file names.