Why add a sway bar to a DP?

Thanks, DH Wants to take it off. When would you do? Real debate going on here, need to get on the road.

Other than the 8 outboard airbag DPs... Prevost, Newell, Foretravel, Monaco/Beaver/HR they all have sway bars on the rear axle to help them from leaning/swaying. Guess you could add one to the front axle if that's the question.
The noise you are hearing could be from it's mountings being worn/loose.

I have never heard of anyone adding one to a DP only gasser