I'm having a wedding celebration and me and my new wife decide it would be romantic to release a dozen Chinese flying lanterns.
Some IDIOT who doesn't know his UFO from his elbow thinks the aliens are invading. He phones the TV station who phone the experts who ALL AGREE it's aliens.
I wake up next morning and read in the paper that 12 UFO's were spotted floating away from the town I'd just had my wedding reception in. I phone the TV station and tell them "it was our chinese flying lanterns"
Exact same scenario but we've removed the 'intent' of hoaxing.
The dumb ass UFO investigators still look like fools to me.
OK, Here's a list of criminals based upon your criteria:
Ray Santilli
Sean David Morton
John Bradley Rutter (aka Dr. Jonathan Reed)
Richard Hoagland
Art Bell
Jim Delettoso
Billy Meier
Ed Dames
Steven Greer
Carlos Diaz
Bob Lazar
Jamie Maussan
Daniel Munoz
Linda Moulton Howe
Brian Bessent
All of these UFO 'experts' and many more are participating in a big money making HOAX.
You left out Erich von Däniken ( <--Wiki link )
No greater hoaxer than he.
