Sometimes they kidnap individuals from the village itself to do more concentrated experiments. That's supposedly what the barcode's for - tracking. Makes it easy to pick up who they want.

[ His wings flex before snapping shut again, shifting with slow restlessness on his back. His eyes may have flickered over briefly at the sound of hammering against the jacket, but he didn't acknowledge it further. Something, though, felt sated in him. Sherlock was upset by it, was how he was taking it. ]

Nasty business all around. Apparently they give out technology like treats if we've done well enough.

[ John's hand slips over, into Sherlock's (his) jacket pocket to procure his journal. He rests it upon the railing of the bridge, flipping it open to where he last left off to skim some of the latest entries. ]