On: As the U.S. fantasizes, the world builds high spee...

[DrScump]

  You can bring your devices without worrying about having them inspected 

Why not?

True, hostage-taking is generally not a risk on rail (Pelham 1-2-3 aside), but HSR is just as tempting a target for terrorism.

Imagine a detonation that derails an HSR from elevated rail, at speed, in an urban setting.

[Klockan → DrScump]

The easiest way to derail a train is to manipulate its tracks, inspecting passengers would do nothing to prevent this.