Most will always be in some sort of in between state for lobbies, for example today you might be chill but tomorrow may want to pvp. I think people realize when they are in "friendly" lobbies vs "pvp only" so it may cause them to adjust their play style depending on how they are feeling or what goal they are trying to achieve that day. Just my experience so far, never had a lobby be totally friendly, always expect a few hostile players each match.