No they aren’t. I mean it’s interesting. But story of the century, nah.
Participating world govm’ts could likely make a hoax seem very real, with the considerable aid of their main media lackeys.
Why? To bring about world panic among the masses, pretty much everyone, and then it could be “Never let a good crisis go to waste.”
Then, keep the hoax going to bring on the One World Government to effecively deal with the aliens...and while they’re at it, implement the digital IDs, CBDC, etc.