They're mods, not gods... they can't be everywhere.
Gozer: [after Ray orders her to re-locate] Are you a God?
[Ray looks at Peter, who nods]
Dr Ray Stantz: No.
Gozer: Then... DIE!
[Lightning flies from her fingers, driving the Ghostbusters to the edge of the roof and almost off; people below scream]
Winston Zeddemore: Ray, when someone asks you if you're a god, you say "YES"!
Dr. Peter Venkman: All right! This chick is TOAST!
Are proton packs destructive devices? Anyway, I agree with the analyses of the other gods - uh - mods.