If other teens are like me, they don't want to help with anything. I remember the many times my parents told me that we're painting the house. I couldn't understand why they kept saying "we." One, I didn't remember agreeing to paint anything. Two, why spend money on house paint? Let's buy an X-box instead. I'd say that's an accurate description of how most teenagers would react.
These parents were very smart. "If you don't want to help paint the house, then this is what we'll do." It's a genius plan that leaves the kid at a complete disadvantage. Kids at school will have an easy new nickname for this kid. You see, when you call someone a dork it usually isn't that impressive of an insult. If the person's room is painted to say "dork," then that's a pretty solid nickname.