The 15 worst mistakes interns have made, according to my coworkers

Business Insider, for example, has an extensive internship program, which not only gives burgeoning reporters job experience and guidance but also provides editors and reporters with the experience of managing people.

To help readers glean lessons on what not to do as they begin their own internships this summer, I asked my colleagues who have either managed or worked with (or as) interns about the worst mistakes they've seen interns make (or made themselves), at Business Insider and beyond.

Their stories don't disappoint. Here's what my coworkers had to share: