I'm not sure Fraser himself would use the tactic Ray uses to resolve the situation.

I'm fairly sure he wouldn't, but I don't think that matters. Ray is there, and this is something Ray feels honour-bound to do, because of the shoemaker and the kid from Ray's childhood and because of what Zuko did to Fraser. I think given those circumstances and in the absence of other recourse, Fraser's willing to stand back and let Ray do what he does.

/random, top of my head, I haven't thought about this in years, add salt :-)