Transcription
A Twitter post from Katie Dippold @katiedippold with the text “Tbt to Halloween when I dressed as the babadook but my friend’s house had more of a grown ups drinking wine vibe.” The attached picture shows her dressed up in black clothes with a white face and intense black eye makeup. She is surrounded by two people not dressed up and drinking wine.
In the US, sure, not so much anywhere else. Halloween is not at all as big in most of the world as it is in the US, so if you want people to dress up it has to be explicitly stated on the invite.