We have family premium plan and my son listens to Spotify on his iPad with explicit content disabled. However, explicit song titles still show up greyed out (e.g. in his Discover Weekly playlist), even thougth the option Hide Unplayable Songs is switched ON.
This week he has the song titled "America F*** yeah" in his weekly playlist - uncensored!!! And it is not possible to remove the song from this playlist, so it will be there for one week.
I suggest that Spotify hides explicit songs completely if Explicit Content is not allowed and Hide unplayable songs is ON.