<p>Continuing @Nick Cox's thoughts in the comment thread, my inclination both as a writer and reviewer would be that if you have encountered useful material on CV that you believe to be original, then include an account of it in your paper (as a brief appendix if you must) and acknowledge its original source. That makes you responsible for it, which removes the problem of relying on potentially unreviewed anonymous posts on the Internet, while complying with the scholarly tenet of recognizing your sources.</p>

<p>If you need a posted image, treat it in the usual way: contact the owner for permission to re-use it. I periodically get requests from publishers in this regard and routinely grant them.</p>
