I'm a flipper catcher, but then I always re-rack the slide so RO can see.
I will admit, when I was a new shooter, I started with a da/sa pistol. I was dropping the hammer with my decocker for a number of matches before a smarter than me RO pointed out that I needed to pull the trigger. Obviously I was doing the wrong thing, but I mever really thought about it until he mentioned it to me.