A red flag I would look for is privately stored images because the hits for those images could be compared with posting times to get a rough idea of what IP address is posting. Your image came from:
Alcoa Inc. 100 Technical Drive IPLD Alcoa Center, PA 15069 US
who I would trust more than say
108 posted on 10/24/2003 6:44:13 PM PDT by palmer
(They've reinserted my posting tube)