I raised an issue in the BBSvTGD education thread that as a society, we should not allow dangerous ideas to proliferate. In the same way that government bans drugs because users can harm themselves.
Now, there is a lot of opposition to this idea because JS Mill has infected people's minds. The following quote is what I mean:
the only purpose for which power can be rightfully exercised over any member of a civilized community, against his will, is to prevent harm to others. His own good, either physical or mental, is not a sufficient warrant. He cannot rightfully be compelled to do or forbear because it will be better for him to do so, because it will make him happier, because, in the opinion of others, to do so would be wise, or even right
I'm not going to attack this on the grounds that people don't actually know what is good for them any better than government does (which is an argument presented by Thaler and co.). Instead I will argue that even if "top-down" governmental nudging is immoral, "bottom-up" societal shaming of those indulging in destructive behaviors is not only moral, but commonplace. As such, we should collectively figure out what behaviors and thoughts are statistically most damaging (remember that in every category of human expertise, statistics are better than experts at predicting things) and then consciously shun those people.
For example, Obesity is a huge epidemic, especially amongst children. With child obesity rates soaring over 50%, and with 2/3 of the Canadian population expected to become diabetic, clearly something must be done. I suggest forcing fat people to ride at the back of the bus, and not allowing them to drive cars. This is doubly beneficial. Not only will they get more exercise, but there will be less people on the road trying to kill me.
Now I realize this sounds like government stuff, but we as people can just take up all the other seats on the bus and sprawl out when they try to sit down. Furthermore, car dealers can just hang out "No Fatties" signs.
However, I have other stuff to do, so I won't actually prove it.