Alright then, i guess the conversation will end with this: You are fine with submitting to a slaver's rule and as such are completely fine with slavery.
In short, yes.
I don't like slavery but as long as it serves a purpose for the greater good then I'm fine with it.
When it's no longer needed (which won't be until I've died of old age anyway.) then I'd raise my voice against Legion if they continued to use slaves.
[edit]
Oh and Nipton was for several reasons.
First was that the place was filled with bad people. Legion wants towns under their control as well but a town that prospers on stabbing people in the back is not in their interest, so they had to go. (Sure, Legion does the same thing about stabbing people in the back, but it's in order to expand their nation and get rid of opposition where as Nipton used it solely for greed.)
Second is that it's a terror strategy against NCR morale, since the Quarry road is closed off caravans have to go through there, everyone has to see the people up on those crosses as they walk along the road.
Third is to give the rest of the wasteland a warning; "We did this to Nipton, if you don't want to end up the same way then don't be like them." It's basically a warning to the rest of the inhabitants of the Mojave of things to come for those that Legion considers to not bring anything useful to society. That bad people have no place in their world. And to show the cruelty of their laws to criminals (PG's).
That's my view on Nipton at least.