Warlocks
Hells Angels are not necessarily the most violent of all the biker gangs. The Warlocks have such a nasty reputation that many of their fellow clubs won't even recognize them. The gang has a history of brutal violence and drug trafficking, similar to the Hells Angels. However, the Warlocks do not give back to society whatsoever, they are only in it for personal gain.
Separate Language
Like many communities, the HAMC has developed a vernacular of their own, often including vulgar euphemisms. One of the more viewer-friendly examples you might hear is a member calling someone a R.U.B., or a "Rich Urban Biker." This is a way of making fun of them, but it can also serve as an indicator for a recipient of violent action.