True. However, that's not a smartphone's fault, but social networks'. In 90% of cases people are chatting with friends and just "passing by" strangers non stop on various popular subjects and their own posts. A smartphone simply provides opportunities to do that any time available (like during boring commuting) versus from a home computer only. Before the smartphones era, there were almost the same thing with tape cassette players, then CD players. At least now they can hear what's going on around without earplugs.