If the vibrations of the nuts cause a problem for someone, then you can use one trick: instead of one nut per bolt, tighten two nuts. You will be surprised to see how reliable it will be. Check this out for authenticity sometime.
Nope, saw it on Youtube too: given enough vibrations, it still gets loose. If you want to be certain: do what my motorcycle uses on it's axis: drill a hole, and place a split pen.