`xscreensaver` sets it to off.
Also improve menu titles.
#+ "Blank" Exec exec xlock -mode blank
AddToMenu XScreenSaverMenu "Choose mode:" Title
-+ "Activate via xset" Exec exec xset s activate
-#+ "Suspend Screen Now" Exec exec xscreensaver-command --suspend
-+ "Activate Screen Now" Exec exec xscreensaver-command --activate
++ "Blank Screen via xset" Exec xset s on && exec xset s activate
+#+ "Blank Screen Now" Exec exec xscreensaver-command --suspend
++ "Activate A Hack Now" Exec exec xscreensaver-command --activate
+ "Lock Screen Now" Exec exec xscreensaver-command --lock
+ "" Nop
+ "Screen Saver Demo" Exec exec xscreensaver-demo