yes, it does.
i did this to my 07 and ran it for a while and THOUGHT i had no ill effects. then on a roadtrip i had to run it up to about 90-95 to catch up with the rest of the group. when i ran over the painted stripe on the road, it sent me into a wobble. bought sh*t my drawers. happened to me twice on that roadtrip. the second time i wasn't going as fast, but still got knocked into a wobble. after we got back home, i remounted the grab bar and never had another wobble again......
can i say for 100% that that was the reason? no, i can't. but it scared me enough that i didn't want to go through it again.