Possible pirate deviation.
I only gave a Brasher Warning one time, only because my trainer told me to. I suppose it depends on the culture/facility, but where I learned it, they had more of the attitude that it was to have an informal conversation to find out what happened and what the pilot and/or controller can do differently next time.
After my supervisor talked with the pilot and listened to the tapes, we discovered that my control instruction was ambiguous and that I should be more clear next time (and the pilot should follow the minimum altitudes on the approach plate).
Didn't get the dreaded number to call on the air since they knew the school... filed a NASA report and nothing else came of it. mistakes happen.
Related, on a check ride with the chief instructor while a controller was training he absolutely chewed the controller out on the air for giving me an immediate turn instruction at ~350' AGL. I don't think that was called for and it made me feel horrible and made the rest of the flight awkward. But from that day on I was much more comfortable with a simple "unable" when I got weird requests.
This sounds like a slightly painful process, but I bet it saves a lot of lives. Amazing.