I'm sure you've heard me mention Flashitool at least one time before. (People do read this blog, right?) But googling it is pretty fun, since you can find all sorts of places for anonymous public exhibition left wide open. Sure you've got your typical 12 year old who thinks pee-pee and poo-poo and various scat and pron is funny when hitting those sites. Bah! That takes no effort nor skill. (At least in all the crude examples I've ever seen.) As for myself, I just like leaving art droppings at various sites. This is where you push flashitool to the limit and bother to do shading and color transitions and maybe even work in fine detail. Such "works" are fun, because it's a marked contrast to the typical vandalism that hits bulletin boards with the flashitool feature. I find more hilarity in making an old smiley crudely drawn with a mouse transition into a Mona Lisa portrait than phallic doodles. But that's just me.
Only catch is to do art droppings you've got to be pretty good with the Wacom. Sure you could mouse it, but then you have to be crazy-like. I'm suprised the Chinese haven't hit those things, because some of them are pretty impressive at what they've done on Drawball. And that has more limitations than Flashitool. It really isn't about the tools when it comes to drawing programs, but rather in how they're used.