OT: Contact

[geoschmo]

Originally posted by Narrew:

It's either that, or we are the only race that is stupid enough to leak our communications out to space (paranoid aliens then).

That is not the only reasonable hypothesis. It may be simply that it's much harder to pick up these signals then we currently have the technology for. Signals don't just bounce around forever in the vacuum of space. Here's a good article by one of the guys involved in SETI.
Can aliens find us?

It paints a pretty bleak picture actually. There would almost have to be an advanced alien race that suspected our system of harboring life that intentionally sent a very strong message directed at us. General planetery communications would likely be too weak for us to monitor unless they were very close by, and if that were true we'd already know about them.

Perhaps in the future we could setup very large space borne antenna arrays capable of picking up low power radio transmissions from farther away. But we aren't there yet.

Intra system and military communications are stronger so we might pick them up, but they are typically narrow-beam directional broadcasts.

Strong inter-planetary signals also aren't likely to be omni-directional, so we'd have to be incredibally lucky to happen to be between points A and B to tap into it. And that would assume there were two highly advanced intelligent species living on either side talking to each other and neither had contacted us yet.