I guess for the same reason I let/encouraged my daughter to sell lemonade on the sidewalk - because I was a crappy parent. What? Do you need a f**king government titanian bubble around you so you'll feel safe and can sleep at night? Need your own food taster to make sure you're never poisoned? Sheesh, lighten up.
Who's paying taxes on this income?? It cannot be construed as a hobby. She's been doing it for 2 years.