[M2d]

kill them now. they are the most horrible birds to have hanging out at your place. as pokerjo mentioned they're loud and awake very early. sometimes a light coming on in the middle of the night is enough to make them start screaming.
they also produce some of the biggest piles of bird crap you've ever encountered. it'll be all over your yard and property once they've established themselves.

and don't kid yourself for a minute that they won't establish themselves. your wife's feeding them, they have a pretty safe area to live in (the fence will protect them from major predators), and it looks like they have a bunch of area to roam around in. they have the moving vans packed up. soon, you'll have little peacock chicks running around as well, which'll be cute for a week or two. then, a few months down the line, you'll have a bunch of adult birds. that sucks and they cease being cute when the aforementioned screaming and crapping occur.

another endearing quality is their propensity to hide in the smallest bush (it's amazing how they do this, btw) and burst out at you when you least expect it. they can also get aggressive during mating and brooding season.

growing up, our valley had a resident population of peacocks, so I know from experience that, regardless of how cute and cool they seem now, your best course of action is to nip this one in the bud.