No.

[He's killed a lot. He's never been tempted to take a trophy.]

And generally, when someone takes something, the person they're taking from is already dead. Maybe you've seen people act differently. But most of what I've seen... Hell, all of what I've seen, is that things get taken when the fight's done. Which means if the neraki take a cuff as a token, it'll be after the damage is caused. They won't get a no cuff equals death correlation.