Oh brother ....
We're not talking about the Terminator here, people. It's essentially a remote-controlled vehicle with a gun mounted on it. Please don't start the conspiracy theories about man vs. machine just yet ...
And even if it were a Terminator-like device, everyone involved would be a lot better off. As long as it doesn't use Windows 95, 98, or ME as an operating system.
Human error > Machine error
Anyway, I think this is a great idea - especially as a way to root out terrorists. Drive one of these into their headquarters, and tell them to come out with their hands up or get their asses blown to bits.