We have daily groups of teenagers from Ferris H.S. spending their lunch hour on our stoop — private property. They do not have our permission to be there. They litter, make noise and are rather mean if we ask them to move and/or clean up after themselves. Calls to the school have gone nowhere — all they do is tell us to call the police. Can the city help in some other way, or offer concrete suggestions? We don’t want to ruin these kids’ lives; we just want them to stop using private property as their cafeteria and trash dump — and to stop throwing nasty words and glares our way when we assert our rights as property owners. We also want the school to address this domehow, as they’re letting the students out for lunch as a privilege. Thanks for your help.