Well, one reason is, the sway control bars serve no function when backing in. There is no reason to have them there. If they make noise while backing in, and you don't want to listen to it...take 'em off. I can see the reasoning behind grandpa's comment, but I have never heard of anyone bending or snapping a sway control bar when backing in. Not saying it hasn't happened, I've just seen nor heard of it yet.
Ed and Sharon
2010 Wildcat 28RKBS
2011 Ford F-250 XLT, 6.7L PSD
Ride-Rite Airbags and Airlift wireless remote compressor...nice!
I thought I was wrong once, but I was wrong!