TEEN ALTERNATIVE: What some called chaos, and others a riot, erupted Monday at Bay Plaza. A social media–promoted “teen takeover” on the first day of mid-winter break ended with several teenagers arrested after running through the mall, tossing shopping carts and damaging storefronts. While that played out, dozens of young people spent the day in structured activities at New Settlement, a program offering team-building, mentorship, life-skills training and paid opportunities for at-risk young ad