1. "LIFE EXISTS?!" Yes Definately. but I believe the first signs of life will come within our own solar system. Not intelligent life but forms of life varying in size from plankton to whale in diameter maybe larger... who knows."WHEN" sooner than most of us would like to think."HOW" Best guess would be europa. "BENEFITS" new forms of life for study and enhancement. "DANGERS" certainly not mass hysteria, but shock felt for sometime. E.T. life would eventually become second nature from desensetation of the subject.
2. "SHOULD HUMANS TRANSMIT" Certainly not. could prove uninviting. let us go to it on our terms.
3."WHY..SETI @ HOME?!" S.E.T.I.'s at least trying and so what if there's no intelligent life, there's almost assuredly life-forms out there to look at and learn from.
SETI@home and Astropulse are funded by grants from the National Science Foundation, NASA, and donations from SETI@home volunteers. AstroPulse is funded in part by the NSF through grant AST-0307956.