Walgreens was recently fined $80,000,000 and OmniCare was fined $50,000,000 by the DEA for infractions of the class 2 regulations. Both major medical providers had policies that they felt fell within the "provider discretion" provisions of the regulations. The DEA disagreed. We're not talking pill pushers or drug dealers here. In the case of OmniCare the recipients of the medications were the infirmed in nursing care facilities. With all the street drugs out there, the DEA felt the need to go after nursing homes.
EDIT With both of these major corporations, with large legal teams, losing "provider discretion" cases, provider discretion has all but disappeared. If you are going to be fined for using your discretion, you suddenly become cautious to the point of not making normally reasonable decisions.