The fuck? Can't this be construed as slander?
Could be, but I bet there's some comedy/parody loophole that protects the creator. Not to mention that Shia himself clearly found it funny enough to get involved with the project. Hell, it wouldn't shock me if the whole thing was subtle viral marketing.
So that's where the gif comes from. I'm amazed I've never seen this...
lol, always cracks me up