Yes! Many time.
Many years ago, when I visited the "5 tigers club" in NYC, during one sparring session, one guy got broken toes from this kind blocking. Back then I liked to use CMA fighting stance (not boxing guard but one long arm and one short arm). I always used my back palm to block my opponent's front kick (or side kick). I then dropped my front arm elbow straight down onto his instep. Most of the time, my elbow dropping would hit on the instep. Sometime my elbow dropping would hit on the toes.
In CMA, this is called the metal strategy. You kick me. I try to hurt your kicking leg.