Some time ago I downloaded some Commercial Application. It was a standalone installation program like Star office or Commercial Games often use. I tried to install the app by clicking on what I downloaded but nothing happened.
I tried the same as root and again nothing append.
At the time I didn't know what to do so I gave up.
Later I realised that I had to change permissions to "execute" and it worked instantly. Even as a normal User.
This experience made me think of this dialog. It pops up if you own the file but the permissions don't let you use it. In any other case the dialog wont popup. If the User try's to open a file from a different User account it also won't popup.
I post my Idea here because I want to hear some comments on this.
PS: there is nothing to download. This is just an idea to discuss.