The paradox of ufology is that we can't trust the government because they've been covering up aliens for 70 years, but now we know aliens are real because the government says so.
The only fact I know for certain is that the federal government and military industrial complex has a history of lying and waging information warfare on American citizens. If they tell me aliens are here, there's no way I will believe them. As much as I want to believe, I simply can't, unless I personally have some experience with an alien.
And remember... no matter what happens, no matter what the government or the "aliens" tell you... do not get on the ships!