You could build something that prevents people from being offended. Let them answer simple questions like are you offenden by . If they answer yes, no allowed to join.

That would still require posts or communities to reliably label their contents correctly right?

Maybe the only solution is sulfuric acid. (or alcohol)

I strongly belief that if we all strived to get the maximum amount of alcohol into our bellies instead of the maximum amount of money into our accounts society would be much nicer.