Easy, yes (doable within 5 minutes). But you probably won't end up with a good end result. The base pic is quite low-quality jpeg and is a hassle to work with in removing residual purple artifacts around the lineart.
You could always upload via imageshack (doesnt need a registered account). Facebook is not an image hosting site. Unsurprisingly, it stinks at image hosting.
Yeah I know, but I'm lazy. I'm possibly most likely to be the laziest artist on beach. Which is why iscribble is the art program/website I use despite the fact that I have photoshop and gimp. ;3
And the reason I upload them on facebook is because I'm already on there at the time that I am doodling. I obviously don't take it as serious. x3