The post title says it all. Explicit songs should not merely be grayed out; they shouldn't even show up. Sometimes my son uses my old phone. I don't even want him to see some of the titles. (Pssst... Apple Music does this.)
Updated on 2019-09-15
Thanks for bringing your feedback to the Idea Exchange :)
You should be able to hide 'unavailable songs' within the settings. This should hide greyed out songs.
If it doesn't work, make sure to create a new thread in the relevant help board here and we'll jump in as soon as we can.
More information about how the Spotify Idea Exchange works can be found here.
Thanks! Stay awesome :)