First, vandalism on something he owns? That makes sense. He wanted a sunroof!
Second, gran rey cero =/= sneaky. At all. It's on the same level of sneaky as what Genoveva did to Pico. So no problem.
Third, It means they're in the way of Genoveva beating Sereg to death? You know, standing between them?
Fourth, attacking the other Espada is not against the laws. Killing is. If unprovoked attacks were illegal, then Genoveva should have been scolded for blasting Sereg. Sereg should have been for trying to hit Edward as well.