I'd even suggest a good percentage of reports are either deliberate hoaxes themselves or genuine reports of hoaxes carried out by others. If not hoaxes, then de

I'd even suggest a good percentage of reports are either deliberate hoaxes themselves or genuine reports of hoaxes carried out by others. If not hoaxes, then deliberate misreporting to cover up worse truths. Ultimately almost any other such explanation is vastly more likely than advanced alien species having crossed the galaxies (undetected) to visit us only to crash land on our little ball of rock.