Is there a firm theoretical limit to this line of inquiry? They're inside labs now, but will they be forever? How about bouncing signals off quasars at gigaluminal speeds?
If matter can't readily travel above light speed but information can, why wouldn't they try that some day?
But why should we rush to help them develop the technology when the management problems posed by this are even more difficult (whose descendants will survive when a new source of political power and awe is unleashed?)
Oh well.
Nice topics, guys and gals.