[exe34]

And in that light, you're worried two blocks the size of a small car will get picked up on the alien's hyperspace scanners?

[krapp]

I'm not, but other people seem to think it's a problem worth worrying about.

[bananamogul]

Yet we spend tax dollars trying to do the same thing.

[kibwen]

No, we don't. If you're talking about SETI, that's looking at radio signals. If you're talking about killer asteroid early-warning detection, we generally don't have the capacity to reliably detect voyager-sized asteroids even in our own solar system, let alone in interstellar space.