Are we the only one's?

Reading various stuff recently on space n people possibly living in it.
Dunno if people have heard of the Drake Equation, basically it's to work out how many planets in the galaxy ( can't remember) may house intelligent beings. current figures put into the equation puts it at 2.3 (scientists obviously don't realise you can't have .3 of a species).
kinda depressing, the Fermi Paradox suggest there is no life at all or else we would have heard of them, or they might have come visited us (his glass was definitely half empty) but this is based on the fact that of out 3 million year existence in the last 80 yrs we have been broadcasting radio and TV ( i think Alpha centuria are currently getting the first colour broadcasts).
But I'm all hoping that were not the only ones, admittedly the "other ones" might exist both a) many many miles away, n b)many millions/billions of years after we're gone.
or theres a galactic consortium of higher beings else where having a good knee's up n were not included yet cos one of the planets hasn't been able to watch the end of Dallas n find out who shot JR.
Another thing I was reading today is that scientist have found genetic material in a meteor, further leaning us towards "the human race came form outer space on a meteorite" theory.
now the fact that some more genetic material has landed on this planet gave me an idea, an idea which started this post, what if we were to fills some steel/rock /whatever balls up with genetic code, or even amoebas, just semi smallish ball's n fire about 100,000 or more into space in every what direction, and i reckon give it several million years and their could be at least 10 populated planets. in fact we could use these as scouts so in a million million years we Can find the habitated planets, wipe out the previous life forms n colonize it. kinda creepy is if another race had this idea before hand....
ps in this post I've added links so other people Can read what i did