not in this state.. those running lights are your directionals too - illegal. I have seen them mounted behind a grill before but it probably wasn't on a Duster - I would be afraid of the heat hurting the grill - - maybe open up the radiator support and make a bracket so the lights will sit farther back...?? Don't want to drill holes in the bumper huh?
Fog lights need to be low to the ground if they're going to actually be used for fog too. I think Ross's car has the best set up I've seen with them installed in the bumper
If you are actually talking FOG and not "driving" I think I agree. I think the combination of higher, and the dispersion / disruption caused by the grill will make a big "mess of light" in the fog ahead of you.