Unfortunately with hidden extensions, many average users in the past didn't realize they were clicking on a file something like MusicFile.mp3.vbs or MusicFile.mp3.exe, was a bigger problem back in KaZaa and Limewire days, but it's still there.

The issue that comes up is these average lay persons you speak of, only being aware of "Spreadsheets, Documents and email" will not understand why the Spreadsheet they copied from work doesn't work at home. And almost any attempt to troubleshoot with them may end up a very difficult task.