Although I have participated in SETI, I think it is somewhat far fetched to think that another civilization would be beaming radio messages our way. Even though we on earth are "advanced", we are listening but not, to my knowledge, attempting to transmit anything to possible alien worlds so why would they. Also, given the distances involved and the vastness of the radio frequency spectrum, it is not at all surprising nothing has been heard.
It makes sense to me to keep trying, but failure to find an "intelligent" signal means nothing.
I agree.. We don't have the technology to properly communicate from the Earth to space...