I think you're underestimating the counterfeiters Frank.

If I were doing it I'd start by deciding which brands and vitola I wanted to fake and then go about re-creating the boxes, bands and labeling for each. If I wanted RyJ Churchill (I could buy a box of Mitch for a Fiver) I'd go into a cigar shop with my phone innocently to hand and walk out with any barcode I wanted. Any date code I'd memorise, it's only eight digits usually so easy pickings.

Voila! 3000 fake boxes of RyJ Churchill ready to rock 'n' roll. And nobody other than those totally familiar with them would be able to determine the fakery.