Preteen Invasion

Yesterday I found a crowd of about two dozen Asian preteens outside my living room window. They appeared to have a young, Caucasian counselor leading them around Teele Square. Tonight, in Davis, a troupe of chain-smoking young teens who said they were from Spain sat within inches of my head--I was reading Joseph Conrad's The Secret Agent on the skylight roof of the subway station (how Somerville). When their charge-type person, a late thirtiesish lady in a white dress, came to retrieve them, they followed her up College Avenue, many lit cigarettes still in hand. What the hell is going on?