Honestly, having the fogs on with the high beams doesn't do any good if the fogs are adjusted correctly. Properly adjusted fogs light up the road right in front of the car, whereas high beams are for distance. If you're in a position to drive with high beams there's nothing that will not be visible without the fogs, or in other words, the fogs won't substantially help your high beams. But it's your car. So long as you put your high beams down when approaching or following then you won't be seen as an inconsiderate driver.