The Walgreens at Castro and 18th streets was robbed Tuesday night by an organized group of smash-and-grabbers who came with garbage bags to fill. A bystander took video of the robbery, obtained by KRON4, which shows the group of about eight young-looking, masked thieves who exited the store with an untold amount of merchandise. A photo from inside the store shows what appears to be a cosmetics aisle ransacked, with whole shelves cleared.