Problem is that the TSA will attempt to impose airline-style security on the system. The numbnuts wankstains even searched passengers getting OFF a train in Savannah two years ago.

http://boardingarea.com/blogs/thewanderingaramean/2011/03/amtrak-fires-the-tsa/
http://theintelhub.com/2011/03/01/tsa-pat-down-savannah-train-video-full-first-hand-account-of-what-happened-during-tsa-search-after-getting-off-train/