Tom is leaving fingerprints and I am sure his identity will soon be known. His knowledge about strikes and his ability to get information is possessed only by a few strike collectors. I assure you he is well known by all of us. Also look for someone who is a college graduate 55 years or older who has retired within the last year and now has a lot of free time.
I think earthlink.net is a very strong clue if it is a valid email address.
There are additional clues that such as spelling, punctuations and positions that Tom has taken on certain issues.