Found this while purusing a BNSF newsletter. Snippet from the article..
"BNSF recognizes there are many railroad enthusiasts throughout the system who can be helpful in reporting security violations and suspicious activities. Next year, BNSF will launch a new program similar to the internal BNSF ON GUARD program to gain rail fan support as another layer in rail transportation security. More details of the program will be released in the future."
The article can be found online at http://www.bnsf.com/employees/communications/bnsf_today/2005/12/2005-12-27-e.html