I've done it once or twice.  Both were due to excessive usage near the lure and line digging into the spool to stop the big cast.

I've both casted off and broken off with braid on more than one occasion, most likely due to me being lazy and thinking it wouldn't happen because it was braid and not retying when I should have. 

1 hour ago, Bluebasser86 said:

I've both casted off and broken off with braid on more than one occasion, most likely due to me being lazy and thinking it wouldn't happen because it was braid and not retying when I should have. 

Yup.  Did that earlier this year.

I've done it a few times.  Seems like I'm always on shore when it happens.

More times than I could count. Mostly however when I alter my casting mechanics fishing from shore due to my surroundings.