Vincent, mostly, doesn’t give a fuck about other people’s protocols and does as he pleases.
From Inside the Grey House:
Not wanting to waste any time with cleaning up, he slipped on the clothing and hurried out of the room. If Lorraine were anywhere, she would be in her study. She always started out the night looking over complaints and potential problems. There was generally a group of people waiting to talk to her each night. As Vincent descended the stairs, he noticed three people sitting on the couch outside Lorraine’s study. Not bothering to acknowledge their presence, he strolled past them, barging into his sire’s study. One started to protest but was stopped by the slamming of the study door.