Proliferate itself would not, because it does not target. Proliferate "chooses", thus the shock ability not triggered. However, with the Grim Affliction example, you can target your own creature to get the -1-1 counter in order to trigger the livewire lash, if you so want to. In general, something is only targeted if the card says "Target ...."
Proliferation doesn't target anything. Livewire Lash's granted ability will only trigger when the equipped creature becomes the target of a spell.
Grim Affliction would cause the ability to trigger, but not because it proliferates - only because another clause of the spell targets.