Fuck legal walls is a stupid thing to say.
Some of the most notorious bombers and passenger train smashers paint legals here.
It's a chance to paint something because you love doing it. The whole "Fuck legal walls I'm all illegal nigguh fuck the love of painting" is ridiculous.
You can't say you're a burner, or going to paint one if you've never taken time on a piece, never learned the skills to paint a good wall, and never change you're outline.