[JBo]

65cobra1,
I've had one come off my ex CSX car and it is not a good thing. I was dumb enough to not have safety wire on them. If rotation kept them on, they'd never come off. It is vibration, lateral force changes and force generated in extreme stops that tend to allow them to walk off.
Safety wire is designed to stop the problem, not be a "tell", hell if you want a "tell" use string...it will do the same thing.
Jbo