In article , Dan Luke wrote:
Granted. Have you ever considered that the stupidest thing humans can
possibly do is to attempt to establish contact with space-faring alien
beings? "Hey! Conquistadors! We're over here!"

We can't avoid it. In the frequency range from about 100KHz to about
2GHz, the Earth has been brighter than the sun for at least 40 years.
Any being that is capable of pointing a radiotelescope our way within
40LY will know that there is something a little unusual about the Sol
system by now.

On the other hand, the laws of physics means it will take them a little
while to get here.

--
Dylan Smith, Castletown, Isle of Man
Flying: http://www.dylansmith.net
Frontier Elite Universe: http://www.alioth.net
"Maintain thine airspeed, lest the ground come up and smite thee"