don't let the n words fool you; 4ch is very actively moderated; both by janitors but also it's users.
It's politically incorrect, but not as bad as Facebook in terms of damage to society.
4chan is like a focus group for unacceptable ideas.
I have always seen 4chan to be more like a youth center than a focus group, with the associated criminal aspects. In both cases the suggested universal solution tend to be an increase in supervision.
At least on anonymous imageboards or even pseudonymous forums you can learn your lesson of how foolish/incorrect you are about something with no future repercussions, no embarrassment, no one to use it against you in the future- you can just up and change your entire perception at the drop of a hat frictionlessly, without paying a personal cost to do it.