It would indeed be a problem. The major problem, of course, is staying on top of the list of organizations. At first blush, it sounds like a very useful way of proceeding. But I think that groups will simply either change their names or drop their names altogether.
What you have to understand, too, about the drug trade in British Columbia--and this is obviously my primary focus--is that it's actually not operated by a single organization, or even by a couple of organizations, but it's operated by a lot of dispersed groups. That's why it's actually inaccurate to be referring to them as gangs. They're not actually gangs in the traditional sense. You have clusters of criminals, of organized crime groups, engaged in different aspects of the industry. Some are concerned with financing and real estate acquisition, some are concerned with cultivation and production of drugs generally, and some are concerned with distribution. They break down across ethnic and cultural lines. There is no way of actually identifying any of these groups. They don't have names.
If you noticed, the recent arrests in Vancouver involved individuals who were referred to as groups. They didn't have any specific name. One group was referred to as the Sanghera group. There's a very good reason for that, and that is that they simply don't allow themselves to be identified in that way.
So what seems to be useful may in fact turn out to be less useful than you think.