Oh, dear.
This is taking on a life of it's own.
. . . . Not sure I'm up to this . . . but a valiant try must be made . . . can't let dear compadre's down.
hmmmm . . . pondering . . .
Wellllllllllllll . . . how about . . .
MIB are those who pride themselves in being PDQ to squealch anything but the party line.
They are gifted in door knocks at 0400 and at removing any hint of validity from any home or site in terms of artifacts related to the very UN-PC UFO and related stuff.
Some have postulated that the MIB are ET's too. Some think of them as merely deeper layers of HARXIST's [Gritch Shrillery's] goons and related troops.
Though their morphing hereon is likely along several other lines.
Hereon . . . MIB's are more likely initiated into the secret society of The Holy And Exalted Keepers of the Tidy Boxes. The first night of initiation reportedly involves learning to sleep in a very tiny box engineered to their form.
The 2nd 24 hours of initiation reportedly involve the careful and sanitized manufacture of precise tidy little box cookies measured with a micrometer. Truth must be the most truly truest truly TRUE truth, you know.
Beyond the above rumors . . . I'm not sure I'm prepared in an open forum to disclose what the MIB really are.
Besides, the world turns; wet birds fly at night and The Matrix mooshes.
A proof is a proof.
And when you have a proof it's because it has been proven.