Maybe in some cases you can link together some open source projects and pretend you did a lot of work.
Joking aside, I agree. There is so many things you could achieve while successfully impersonating someone. Seems like the best you can do in academia is to ruin someone's career. In this case it seemed fortunately "harmless" though.
Fake being a surgeon and they’ll assign you to surgery, etc.
Relevant xkcd: https://xkcd.com/451/
Judging by some of the revelations in other business it seems not exceptional for people to add things to their cv's they've never done. And it's much less likely to ever come out, because people are less likely to check (and it might also be more difficult to check)