While Apple’s iTunes Radio is set by default to block songs with explicit language from streaming, the current filters are far from perfect, with profane content slipping through the cracks to the surprise of some listeners.
A reader who contacted AppleInsider said that although they had purposefully left the explicit content filter on, they found that multiple uncensored songs continued to play. In one example, an uncensored version of the track “Billionaire” by Travie McCoy and Bruno Mars, which features a prominent “f-word” in the opening lines of the song, was said to have played on numerous occasions in front of children.
In our own tests, we also found that explicit content was slipping through the cracks, though many censored songs were also playing with the toggle enabled. Still, many songs with language considered to be unacceptable on radio and television in the U.S. were still being played through iTunes Radio.
Conversely, it seems that the same issue also exists in reverse: Users turning off the filter, in order to allow explicit content to play, report continuing to hear censored tracks, rather than the original explicit language.
Read more here.