Actually these guys are pretty safe riders overall and do use flags, lights, etc. and for the most part obey common courtesy rules of the road for bikers like single file for cars etc.

That said the DA will most likely go after her pretty hard. Especially if she was under the influence when driving. There is a very much zero tolerance philosophy here in LA over drinking and driving. Especially when there are injuries involved in the accident. With a couple of the riders in the hospital with critical injuries she will most likely be looking at a long list of charges regardless of them being on bikes.

Oh and allot of police officers are riders in LA as well. Ironically they are also the ones who tend to break the laws the most and don't follow common bike to car courtesy rules from what I have seen. YMMV.