I've dealt with ghosts on a semi-regular basis, but they've been pretty uniformly hostile. Not a Casper in the bunch, not like we're seeing here. Got a pretty good recipe for "ghost powder" that might be good for dealing with them, though we might need Stark's credit card for it.
But I moseyed on over from New Asgard to have a look at the Hangar with my Sight. Bad vibes, but I couldn't see any direct signs of enchantments. But it's the same kind of feeling I get where pretty dark magic's been worked.
Definitely ought to up our defenses. I can help get some wards going, but I can't promise how strong they'll be. Even with a lot of power behind them, the really good protective ones rely on a place being an actual home, and I don't think too many people here think of it that way.