Now, you see? The [aa] tag is FAIL. What good is a tag for ASCII art when it uses a PROPORTIONAL-WIDTH font? ASCII art is done with a FIXED-WIDTH font.
About all the good that the [aa] tag is for, is to preserving the use of spaces in your art, but you have to use a proportional-width font, and that leads to the semi-ASCII faggotry we've seen here on 4chan.