How Some Gen Z Instagram Users Post to Facebook: Unwittingly Teenagers and young adults are flummoxed. The reason it keeps happening involves an online prompt and product design. Author: Kalley Huang and Sheera Frenkel Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to email a link to a friend (Opens in new window)Click to print (Opens in new window)MoreClick to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Tumblr (Opens in new window)