20-pound sledge hammers, having a very difficult time to break a window, because all of our windows have ballistic missile film on them. >> reporter: many more malls now beefing up security and californian authorities promising action. >> these people need to be held to account. we need to investigate these crimes. we need to break up these crime rings. and we need to make an example out of nethese folks. >> reporter: in oakland this weekend -- >> we will have tactical teams deployed throughout the city. >> reporter: but even when cops are quick to the scene -- with a mob, many will still get away. >> so why is this happening right now? well, the stores are fully stocked for the holidays and there's also a market for stolen goods this time of year. and some experts tell us the penalties for this sort of crime just aren't high enough. here in california, for example, if you steal goods worth 950