I'm probably way behind the times here so apologies if the answer to this is blindingly obvious. Out of boredom tonight, I made a couple of characters on (EU) Ravenholdt (RP-PvP), EU Ravencrest (PvP) and EU Ragnaros (PvP). In each case, upon arriving in Goldshire with my newly minted level 1 Priest, I immediately noticed that a) I wasn't flagged for PvP and b) many players around me were also not flagged for PvP.
Now, I started WoW 8 years ago and I'm aware that much has changed in that time, but as far as I was aware, being on a PvP realm of any kind meant that you were auto-flagged for PvP, couldn't switch it off and you took your chances. It would appear this is no longer the case, so the next obvious question is: what's the point of designating realms as PvP-enabled, when PvP can be switched on and off manually anyway?
Am I missing something?