That must be because they have royally failed at everything else.
How long have they been fighting that "war" and have continued to lose?
Lacking the ability to stop the smugglers, etc. they now have to invade the world of couch-potato snacks...sooner or later they are going to find a fight they can win, even if it means having to go after the people who remove those "do not remove" tags from furniture. The DEA is such a joke!