Gary Woods wrote:

Consider how long we have been transmitting reasonable RF levels, and
that
increasingly transmissions are in digital modes at lower power, not to
mention indistinguishable from background noise if you don't know the
coding scheme.  The time period some _other_ civilization would
produce
signals that we have a prayer of detecting is well under the blink of
a
cosmic eye.

SETI is looking for deliberate, unambiguous signals, not accidental
ones.

-- 
   Erik Max Francis && max@alcyone.com && http://www.alcyone.com/max/
 __ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
/  \ To be adult is to be alone.
\__/  Jean Rostand