Rail screening is completely impractical. There are WAY too many stations; there's no way they could deploy TSA or other security staff to all of them.

Furthermore, it does nothing to address the largest hole in rail security - unsecured tracks. This would be a giant waste of time and money, not to mention the gigantic cost it would have on the economy.

I guess we could wreck our economy through all of this "security" nonsense, then become like the Chinese - and invent ever more fake security jobs to keep people employed.