In Windows-land and seldom elsewhere, it was more like "don't run random executables and don't open attachments and ask a sysadmin about the site/flash page/app

In Windows-land and seldom elsewhere, it was more like "don't run random executables and don't open attachments and ask a sysadmin about the site/flash page/applet you're about to visit". I dare you to ask your grandma what is a .vbs file, without googling...