Wow, this is getting real, very quickly. This is a very, very different enemy than taking on a corrupt government, who still needs to stick by some sort of rules.
Assuming that this really is an Anonymous-supported act, I'm not sure if this is an enemy they want to engage. If they do end up taking on a drug cartel, do they really know what the consequences of this will be? I think Anonymous really needs to think deeply about the consequences of releasing names that would most certainly result in the loss of life.
Keep in mind that Anonymous isn't a single entity with formal leadership making decisions. Anonymous is a loose collective, and anyone can operate under their mantle if they can convince others to go along with a plan. This means that different groups operating under the name of Anonymous may have wildly different interests, goals, and membership.
Assuming that this really is an Anonymous-supported act, I'm not sure if this is an enemy they want to engage. If they do end up taking on a drug cartel, do they really know what the consequences of this will be? I think Anonymous really needs to think deeply about the consequences of releasing names that would most certainly result in the loss of life.