I've diffused confrontations. Scared people off. Lived next to a (then) Massachusetts Correctional Institute halfway-house with a 45% recidivism rate. The inmates were male, convicted of crimes that ranged from minor drug infractions to manslaughter.
I've been burglarized a few times, had violent neighbors, lived in what some folks call the "inner city", shared the sidewalk with drug dealers and prostitutes, been the one in my building that wasn't sexually assaulted by (insert this month's suspect-at-large), avoided a few attempted robberies (for my bike or for my musical equipment), dodged one serious stalker and several casual stalkers, and survived an arson attack. My old apartment unit bordered an apartment unit that housed an infamous Boston criminal/folk hero. We shared a common wall thin enough to hear each other's telephone conversations. I've pushed away drunks twice my size, screamed my lungs out to fend off drug-addled freaks, and acted like an insane fool to escape a bad situation.
I'm also out alone late at night, every week night, as I work 2nd shift at a place nearly 50 miles from my home, and have had to scare off a few whack jobs on times I've had to refuel in the early morning hours. I've called 911 a approximately a dozen times about events that I was not personally in, but close enough to see during my night commute home.
Sorry for the self-indulgence, but this is a subject that touches not just a nerve, but the cerbral cortex to which that nerve is attached. The problem I have with using the "real fight" metric of self-defense experience is that such a metric tends to ignore the value of using one's brain.
It's not that I think physical combat skills are unimportant - they certainly are. But having the analytics and discipline to avoid trouble or walk away from a tense situation is just as important to self-protection. Unfortunately there isn't a glamorous way to measure that skill.
Outside of class, I have never had a punch thrown at me, or a weapon drawn on me. I intend on keeping my "perfect record".