We use restraints often. They are supposed to be taut, but at no point would there ever be fear of dislocating anything, at least not the way we play. I have been restrained with my hands tied together and high above my head. Again, at no point did I feel like I would dislocate a shoulder. If I did feel that way, the safe word would certainly come into play, but my husband doesn't want me drawn and quartered. That's not his thing.

I would think if you dislocate something, due to over restraint, you may be doing it wrong. I don't know though.