How could an alien speak English, no whats going on that particular radio, or how could he/they/it tap a cellphone, how could they gain the knowledge, the intelligence to do all this and to know, the government isn't crazy and neither am I.
and as for this, if they can engineer a craft (or grow one, certain people say they could have biological craft) that can travel trillions and trillions of miles before they die (assuming they die) their IQ, if measured by human standards, would be something like 1,000,000. honestly, learning a language? not hard. tapping a phone? why can't they disguise themselves as humans and buy one? to put it blatantly, our minds, while vastly advanced by our standards, are far too inferior to any species that could do this. we still assume that an alien would be a biped. why can't they be triped? why do they even need legs? when you sit there and think about it, you realize our insignificant thought process. why would they think like us, be greedy, want domination? maybe they'd be happy with just floating around out there.