Never suffer a spell lock to live. If you can ground out a physical spell, so much the better. The bad guys should have a spirit or wandering elemental on hand to crush these spell locks. Elementals are awesome and no sweat to NPCs. A force 10 fire elemental is chump change to any corp.
Sales Reps have bigger bar bills when wooing customers.
They don't care. And remember, if a mage is casting high force spells, he'll make a target of himself. Any spell with a force greater than 3 will be noticed by everone. People shoot spell casters just to be on the safe side.