You can learn more about people's lives from their online customer reviews than anywhere else. When people review products online, they are less concerned with how they are personally coming across and, if it's a negative review, are more concerned with airing out their grievances, thereby allowing their true personas to shine through. You can't get that level of unfiltered, uninhibited opinions from someone's personal social media profile. That's obviously curated in a very specific way. The o…