That's making the stupid presumption that you're informed of the facts and are in possession of the physical evidence. Carl Sagan is right, but forgets to mention that extraordinary claims and evidence will certainly inspire extraordinary opposition. I have no doubt, nor did Gordon Cooper, for example, that the government has taken such extraordinary measures. For good or bad (I tend to think for good), but extraordinary is as extraordinary does. Sagan's quote is moot.
You ask what I do. I base my conclusions on independent thought and trust my common sense, imagination, and instincts even when they are inconvenient and unpopular. I've done well by myself in trusting my ability to be an original thinker. I figure I'm in good company. Much of the best science in the world has been inspired by imagination and instinct. If I remember correctly, Einstein said as much many times.
I'm impressed that you crunch radio telescope data, but not impressed that you think that covers everything, including the human element. I repeat that Scott Peterson's lawyer would have liked to have had you on the jury.
Original thought or instincts are not evidence.
If it leads you to actual evidence. Great.
I look forward to reading about it in Scientific American, National Geographic and every front page of every newspaper on earth.
Then it will have my due attention.