That's right, folks.
We tried barracading him in the kitchen when we're gone, and that worked fine - but when we're home, as much as we try to watch him, he's always found at least one moment to sneak off for some
"crunch 'n munch" in our cat's litter box.
It makes me sick to my stomach thinking of my adorable Sully eating kitty poo.
BLEHHHHH!!!! But he even comes and tells on himself! He'll come back into whatever room I'm in and cower at my feet. And when I pick him up, I KNOW THAT SMELL!
I tried everything, and even though Sully knows better he still did it.....so I moved my cat box on top of our bookshelf! 
Now my cat has to climb all over to get to her box, but she doesn't seem to mind much. I just feel sorry for her
(and when she comes out of that, it 'rains' cat litter...
...but just a little bit, and it's clean, haha.) But hey, this works and nothing else has! (Please excuse my messy computer room....it's on my weekend to-clean list, trust me.)
I think I embarrassed my cat by taking a pic of her headed toward her bathroom - she's so prim and proper, LOL!
If there's ANY better idea out there, I'm oh-so-open for suggestions! 