Only thing I could find on it was this:
A woman set her Madrid home on fire this week as she cooked up a potion in an attempt to imitate the fictional wizard Harry Potter, emergency services say.
www.abc.net.au
Though I'd hesitate to blame Harry Potter so much as a lack of common sense - like Piotrsko said, there are a lot of ways to light a fire and some people don't have the slightest bit of common sense or impulse control