to the best of my recollected archives, I verbed this adjective (I had already adapted, adopted and improved my ron obvious personna) way back in 1994; to wit (and completely out of context), from a private email:

maf> > those weren't really questions, were they!
jmh> neither was that.

maf> there you go again. <Reaganesque pause> Obviousizing the stated.

I believe the only other person who has actually been observed using it here is our own ASp.
-ron o.

p.s. - for the etymologists, I think the usage was influenced by the phrase "it's casual to the obvious observer".