Here is why I did it. Notice my rear stand, there is no handle. For my rear stand, I put it under the rear stand and step on the back, jacking the bike up (which I do when I need to, not just when I have the rear seat on). I use the grab rail to hold the bike upright and steady while I am lifting the rear. Without my grab rail, there is very little to hold on to - especially after I did the fairing screens.
I suppose one could argue that it would have been better easier to just get a new stand, but this is the one that I bought for my bike, in Japan, and it is my favorite stand. Also, when I did my hump storage mod, I did it incorrectly, which caused a larger than normal gap between the hump and tail fairing; having the grab bar there masks that flaw.
As far as passenger riding. my wife uses the grab bar when riding, because we communicate via intercom and I warn her anytime I am changing speed or direction. Typically, she will grab ahold of me when accelerating and hold the grab bar to keep herself from slamming/sliding into me during hard braking.
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