Digital canvasses which set off some criteria get an OOC warning embedded in them that players should not use ASCII art in game artwork. This warning is problematic for two reasons:
1) It shows up once the art is finished and no longer changeable and remains present forever, rather than warning a player during the process when it would be needed.
2) It false positives on all sorts of things that are not ASCII art and leaves tons of in-game items with warnings attached to them they do not need and that can't be removed.