The spell description of wall of force is silent on the question of whether spell effects can pass through the wall. The semi-relevant part of the description states:
Nothing can physically pass through the wall. It is immune to all damage and can't be dispelled by dispel magic. A disintegrate spell destroys the wall instantly, however. The wall also extends into the Ethereal Plane, blocking ethereal travel through the wall.
How are folks ruling on the question of spells passing through the wall (in both directions)? If the answer is that spells cannot pass through the wall, do you rule that it also blocks line of effect (so that you can't target a spell on the other side)?