I have observed this as well
On Thu, Aug 10, 2017 at 4:44 PM, Stephen Morris <samorris(a)netspace.net.au>
wrote:
Gnome, unlike KDE, has marked every application on the Gnome desktop
as
untrusted
I have observed this as well. They show up as untrusted also if you try to
execute them out of Nautilus.
--Greg