We pulled an FOI on an organisation recently, asked about a return of scheduled acts between certain dates and received a "there are no **** acts at this time". Combined with another act that is prepping to set up right now that will greatly support the first act, we could, if paranoid, think that the first act is about to re-occur. We have no proof of the first act, but the fact the second act was used in the past to create a moral issue with the first, even though the second act could be used in all innocence, is a risk.
Now, if you understand that, but you don't have details of the two acts, you're probably already starting to think, "well, there's logic at play here, and without evidence it doesn't mean it's not going to happen." With my situation, there has been historic evidence of acts.
With alien interaction, there has already been alien interaction, or at least uncertain alien interaction, which is blurring the lines and causing it to be very difficult to answer one way or the other.
For a ship to travel 60 light years, crash and kill everyone aboard, is that believable? For a ship to travel 60 light years and disable nuclear weapons in silos to push a subtle message forward to world leaders? Far, far more believable. We seem to be locked into a time scale waiting for exposure, at the right time for humanity. Will it happen in our lifetimes though, or do we die wondering if our kids, or grandkids get to live through it.