For example, there are many people on HN who absolutely cannot comprehend why people prefer single family housing, with a yard, and a car. So much so, that I've considered writing an article from my perspective, about why I prefer low-density housing.
The ratio of commenters to lurkers is super low, and (speaking from experience), commenters often have mental problems, which drives them to post excessively.
The vast majority of Americans are absolutely nothing like the drivel we read online. I waffle between thinking this is caused by "terminally online" folks like myself, and bots aka astro-turfed corporatism. Either way, the opinions we read online do not reflect reality. Historians will have a hoot interpreting our society and describing it from the perspective of the Huffington Post and Wall Street Journal.