>>There may be a legitimate reason for this brainstorm , perhaps to make preparation to make such a thing less likely .<<
Do you really think terrorists haven't thought of just about everything we could come up with, and more? I mentioned rail because my wife works in that industry and we talk about what could happen and what they are doing about it all the time.
This little conversation is much less harmless that advocating the removal of intelligence gathering, claiming the war is lost, calling the president a Nazi, or leaking secret information as the left does on a daily basis.
Get a grip.