Young people are discovering that “digital footprints” are real — and a real problem for our most-online generation. A TikTok user has gone viral after sharing their social media nightmare, claiming they missed out on a job because of something their potential colleagues had seen them post online. “Me realizing the digital footprint is real because when called for a job interview they loved me but when they did a background check they said they didn’t want to hire me anymore,” the TikTok user, @shoomew, wrote in text over a recent video — with more than 4.1 million views since...