Over the past year, I've noticed a topic where Less Wrong might have a blind spot: public opinion. Since last September I've had (or butted into) five conversations here where someone's written something which made me think, "you wouldn't be saying that if you'd looked up surveys where people were actually asked about this". The following list includes six findings I've brought up in those LW threads. All of the findings come from surveys of public opinion in the United States, though some of the results are so obvious that polls scarcely seem necessary to establish their truth.

1. The public's view of the harms and benefits from scientific research has consistently become more pessimistic since the National Science Foundation began its surveys in 1979. (In the wake of repeated misconduct scandals, and controversies like those over vaccination, global warming, fluoridation, animal research, stem cells, and genetic modification, people consider scientists less objective and less trustworthy.)
2. Most adults identify as neither Republican nor Democrat. (Although the public is far from apolitical, lots of people are unhappy with how politics currently works, and also recognize that their beliefs align imperfectly with the simplistic left-right axis. This dissuades them from identifying with mainstream parties.)
3. Adults under 30 are less likely to believe that abortion should be illegal than the middle-aged. (Younger adults tend to be more socially liberal in general than their parents' generation.)
4. In the 1960s, those under 30 were less likely than the middle-aged to think the US made a mistake in sending troops to fight in Vietnam. (The under-30s were more likely to be students and/or highly educated, and more educated people were less likely to think sending troops to Vietnam was a mistake.)
5. The Harris Survey asked, in November 1969, "as far as their objectives are concerned, do you sympathize with the goals of the people who are demonstrating, marching, and protesting against the war in Vietnam, or do you disagree with their goals?" Most respondents aged 50+ sympathized with the protesters' goals, whereas only 28% of under-35s did. (Despite the specific wording of the question, the younger respondents worried that the protests reflected badly on their demographic, whereas older respondents were more often glad to see their own dissent voiced.)
6. A 2002 survey found that about 90% of adult smokers agreed with the statement, "If you had to do it over again, you would not have started smoking." (While most smokers derive enjoyment from smoking, many weight smoking's negative consequences strongly enough that they'd rather not smoke; they continue smoking because of habit or addiction.)