To give the complete picture though, recent Windows warn you before applying the changes to the file extension.
Although the users would still blindly click "Yes" even if the dialog asked for their firstborn child.
Although the users would still blindly click "Yes" even if the dialog asked for their firstborn child.
Now here's an idea for any software developers - grab AutoIt (is it still around?) and make a quick script called "typical_user" that automatically clicks "Yes" (or similar) on any dialogs that appear. Now, run this in the background while testing the UI of your software :)
Edit: Yes, AutoIt still exists! http://www.autoitscript.com/site/autoit/
For automation, it's replaced AutoIt in my toolbox - just in case I get another contract in the future like one of these.