Have you ever thought drawing with ascii chars ? No ? Well, many persons do that on internet ... no, no, they aren't mad or insane, if you don't believe me just look some works here. You can give your contribute or simply download pictures and animations. My private collection is about 20Mb (just some hundred of pics and animations)! Some of them are now on-line in the gallery page.
Someone calls Internet a cyber-world, every ASCII-ART picture is a sort of graffito on screen, a sort of 'primitivè form of art over a new kind of walls.
I discovered it by chance, the first pictures I downloaded comes from nic.funet.fi, I was initially suprised by some of them.
If you want to know more about ASCII-ART 'styles', I suggest you to read the FAQ collepted by Scarecrow.
ASCII-ART images aren't all on BW or 'shades of gray', you can find ANSI color animations and big pictures for VT-100 or PC ANSI (I have a 'small' collection of some thusands of .ANS pictures and few long animations!).