You can argue the point 2 ways
1. Bruce Perens did BusyBox for fun and gave it away for free. After words some people were bad and got sued. So what does his making it for fun and free have to do with after words people got sued
2. Bruce Perens did Busybox and fun and gave it away not for free. His price is that if you it in a product (or portions of it, details don't matter to the point) that product (or portions of it) must also be GPLed.
If you take this interpretation then we're back to the same thing, what does this story have to do with "Writers could do it for fun and give away their work for free."