Don't tempt him. If he had the microbots on him, maybe...

A quick flex of the plastic on that one, too, and then he's pocketing it with the rest. "Not unless you have a habit of carrying copper with you," he answers, turning to walk again. "But all that aside, I'd suggest you get used to 'roughing it'; this place is somewhere between sixty and a hundred years behind San Fransokyo. And most people are still deciding whether or not they like us - ask someone else for the history, but the short of it is that the 'Foreigners' can make an easy scapegoat. We don't need you giving them more of an excuse."

It's clear he expects Krei to follow. Say what you will about Callaghan, but he does tend to make good on his word, or at least try.