Not really. Since it's his ancestors' tombs, their stuff belongs to Noct anyway, right? The Empire's more mad he's still alive in the first place, I think.

...

Uh, 'cause of the whole, he's the rightful king of Lucis and going to kick their asses and save the world thing. So they've kind of been hunting us since the Citadel fell. ...Especially once we started busting their bases.