Except...
Even with hidden file extensions it's bloody obvious that a file is a an executable even when named *.jpg.exe, as it shows up as application not a picture; and it's only common file extensions which are hidden by default, so if they're hidden and you can see the .jpg extension, you know it's not a .jpg.
I hope none of you work in IT.
This is a none article anyway, the fact it's a quote from Trend should of set of alarm bells before the utter bilge that Genes started spewing; all of which is incorrect.