Never had one break that was installed after the bass purchase. Only one that every failed on me happened to be on a Warwick, one of the older ones though that was sunk into the wood. Something happened where the pin just stopped clicking in. If I remember correctly Warwick replaced it, no problem.
If you're worried about it coming out of the bass (assuming it's a post 2000 Warwick), I'd suggest taking it out and then putting it back in with a toothpick and some woodglue. That's what I always do for extra insurance. Jam the toothpick in the screw hole, break it off, put some glue in there and on the screw, and and screw it back in. It won't be goin anywhere after that.
And I'm going to join the talkbass grammar police today.
Brake - what you step on in a car to stop it.
Break - when something gets busted, or you take some time off from work.