. >> reporter: vienzo and other members support the registration law.but the city's entertainment commission is also considering technology to scan and collect clubgoers personal identification at the door to track them in the event of trouble. >> i'm worried about people's civil liberties. i'm concerned that people can share these lists, how do you make sure these lists aren't shares. >> reporter: the safety commission takes up the registration law on monday, if the ordnance is passed by the full board of supervisors and the mayors it coulde in late november. >>> police in san francisco are considering an unusual plan to discourage shoplifters. the city has 300 more shoplifting cases. the da says rarely prosecutes them. the public defenders officer says the plan punishing people who haven't been convicted. shoplifters can be treated the same way as those who drive under the influence. >>> police are investigating six armed robberies this week. other attacks which are marked here by this map were against men and women of all ages and took place on wedne