Seems to be a tool for people who take themselves and their little opinions way too seriously.
The transmitter doesn't know the hearts and minds of the 7 billion potential receivers in order to avoid offensive intelligence, while receivers are quite intimately experts and what uniquely offends themselves, so it only seems obvious the receivers should do the filtering.
Being offended doesn't actually do anything anyway. Nothing happens. No one dies, gravity still works and Nickleback still makes sh*tty music.