[irthomasthomas]

Assuming that it is aliens, for a moment, we can not know if these aliens are friendly or hostile, right? So, given that there is a 50/50 chance of them being hostile, and given their awesome show of strength, the precautionary principal dictates that we not advertise our presence too loudly.

[goatlover]

They wouldn't know about us for 500 million years, assuming we could emit a strong enough signal for them to detect that far away. Any aliens that could actually pose a threat would probably be close enough to pick up our emissions anyway.

[pvaldes]

33 % chance of being hostile, 33% of being friendly and 33% of do not wanting anything with us in decades by cause of an humongous jet-lag