Snitches Get Stitches
No matter what, don't rat out a fellow member of the club, regardless of what kind of unsavory business with which they're involved. It's not unheard of for members to be questioned by the authorities. Despite what may happen, members may never incriminate fellow members or the club as a whole.
Subtance Abuse is Not Tolerated
Although Hells Angels may have a "tough guy" reputation, not every stereotype associated with the organization is true. The group employs a strict zero-tolerance policy against substance abuse of any kind: "All 'contact or use of [substances] is strictly forbidden' as is the use of needles 'for pleasure.'"