I agree. this should be a topic but we have to be very careful how we approach this. Personally I'd like to see filters / algos activated by the user and for severe issues (such as child pornography) a consensus based blacklisting protocol should get activated that requires a majority vote by relay operators to not only block/mute such content but also make any attempt possible to expose such people. Aka to law enforcement and co.
But yeah, this topic is a slippery slope yet we should explore options.