One good Cannabis plant, grown outdoors, can easily yield two and a half pounds or more. Four plants might well produce up to 26 pounds of Panama DC, by Canabiogen. With a 9 week flowering time, there are potentially three crops per year outdoors, plus three crops per year, of 2 pounds each, indoors, for a total of about 50 pounds of product, per year. Typical auto flowering plants grown indoors might only yield about 1 ounce each, but that's still potentially a pound and a half, total.

So, let 'em get a warrant!