Comment # 9 on bug 994769 from Dawid Kr�lak

(In reply to Jan Engelhardt from comment #8)
> What I am saying is that allowing other user identities in the system access
> to your device node (whether that is /dev/dri or /dev/nvidia) would seem
> like it opens the door for programs run by that other identity to make
> secret picture snapshots of your desktop. As such, it is a sensible
> *default* that the "boinc" identity is not in the "video" group, or that it
> otherwise gets access to these device nodes without your explicit manual
> activation.

Ok, I think I get it. Thanks for explanation.