During a gig we once did a planned simultaneous guitar/bass throw mid-tune. Things went fine for me, but not so much for my guitarist. His guitar did a face-plant headstock first to the stage, and a tuning peg snapped off. He couldn't stay in tune the rest of the show.
Same show, next band. Guitarist does a throw and same thing happens. Guitar hits stage headstock first, and the headstock snaps right off. It was a 1 or 2 week old Ibanez S-series: nice gitter. Headstock snapped below the nut, taking the locking mechanism with it. /guitar
Not a good night for guitarists
In the case of my guitarist, the problem was not the fault of the straplocks: the strap came undone where the fabric loops back over itself and is sown together. Cheap strap (nylon?): unfortunately, that type is good for throughs due to little friction. So, be mindful of that as well.
FWIW, I've used Hipshots and never had an issue.