I think knit graffiti is a fantastic idea. perhaps you should place him in a busier place that's less likely to suffer from your mousy, somewhere more in the open with no buildings to write on. maybe around a street sign that you pass by often.
These rock! I love the black one with the IKEA fabric especially. You make me feel as if there is some hope for me! I, too, may be able to make wearable clothing one day, if you (a self proclaimed beginner) can make such amazing things!