The core of this OPs post are some errors. That the local hot shots were even hot shots is one- I've never seen any shooter in USPSA try the brace the gun when shooting for speed. After that first time, experienced shooters advise against it. They never do it again.
At the core of the "debate" is the training scar. In simple terms, a training scar is the indoctrination of something to the point that one does it without thinking, and the thing is done because it is what one always does in training or practice. It is a negative term; it should have a negative effect. To really drive home a habit, stress is introduced. Military training engages in this using repetition and stess: "SPORTS!" screams the Drill as you execute your immediate action drill to the M16/M4 not firing. "Get behind cover, reload that gun! Faster faster! You're partner is getting shot while you fumble with that magazine!" And the Training Cadre is doing the same to you. You can induce your own stress with competition and create patterns/habits which will likely be auto-engaged. So one question might be, "is it a scar" or a good practice or even a habit?
The most easily understand example of the training scar was the "policing" of brass on the range after each sub-set of shooting a qual. Officers were found dead with brass in hand or in pockets- they had been so conditioned (though repetition and angry loud direction (stressor) to "pick that brass up off my range!" that they did it in a fire-fight when they should have been focused on killing the f....r.
http://www.nlptimes.com/blog/2009/06/07 ... -practice/
The attempt by some to label the practice of shooting only twice at a target as training scar is understandable, but dubious. It really depends on what the individual is doing as opposed to the simple practice/habit of scoring the best two shots per paper. In USPSA we score the best two hits per paper, so the assumption is we fire two shots at the paper, no more, no less, and move on.
(Recently I ran a stage were we scored the best three hits per paper... interesting reactions from shooters when we asked them to think a bit more on one course of fire).
If the individual is shooting a shot, seeing the sights when the shot breaks, then doing the same things a second time, and having seen two accurately fired shoots, decides to move on this is less a of a negative scar than can be reasonably argued. This shooter will make up one or more inaccurately fired shots. Thus, no scar of blindly firing two shots and moving on no matter what is being created. That would be a training scar. And, that is the training scar that is being proposed. It is is proposed because some don't understand what "we" are doing.
It is correct that USPSA shooters should not be "programming" ourselves to shoot twice and roll on, we should instead be programming ourselves to make good called shots first and programming ourselves to make up inaccurate shots. This is programming to think. Not to mindlessly do by rote. The former is never a scar, the later would be.
We SHOULD be seeing a sight picture and calling the shots. Are we always? Maybe not. But proper visual patience and called shots are the counter to the perceived "scar." Oddly, all LEOs and Military guys should suffer this same scar- In training and quals both they can't shoot a target to the ground. Instead they shot per a standard format, set number of shots, under a set time limit and are graded... they are gaming.
I know I just stepped on some toes. Harden the "f" up and keep reading. You'll see I am right and why without intentionally being a jerk.
LE and Mil are required to shoot the min (and often Max) number of shots per paper. The paper targets don't fall so they don't actually instill a shoot to the ground training or practice. So, I ask the "ninja" how he practices shooting a target to the ground? IN all likelihood.. He doesn't (unless he is creative enough to attach a falling steel behind the target and shoot it until the shots passing through the paper impact the steel enough times to drag it down. Instead the "ninja" shoots the target repeatedly with no real reinforcement of accuracy and says he's not scarred. Instead, he's substituted the poor practice of shooting a random but large number of shots for the practice of only two shots. In reality our USPSA "practice" is no less dangerous than all the LE and Mil training and practice... ruminate on that. Use it with my permission. If either the USPSA shooter or LE/Mil bothers to call his shots and makes up any of the shots he calls inaccurate, then no scar is being created.
As mentioned, steel is another counter to this perceived training scar, shoot the steel to the ground, make it up if the shot was errant or ineffective.
A true training scar might be the rush to unload and show clear. If we want our competitive sport to help support our self-defense maybe we ought not immediately drop the mag and empty the chamber. But wait, reality says the following: unless the bad-guy calls out IfFinished,Unload And Show Clear... and I do it like an automaton; I'm not worried about a training scar.
In reality I have shot the targets I wanted to shoot. Saw the shots I wanted to see, made up the shots I wanted to make up, drove steel to the ground, and often scanned the last few targets to hits before I start to unload. Again, do your USC as a deliberate thinking act, not a blind and mindless act.
BTW, we don't shoot 32 (minimum) courses of fire because we stupidly think we'll be engage by 16 bad guys... we do it because it is FUNNNER than shooting 1 target 8 times, or 5 targets 2 or 3 times. Consider- if I can keep my head in the game through 16 targets, I'm more ready than those you can't to deal with 1 or 2 guys which I might need to engage with a whole bunch or shots for whatever reasons.
The stupid argument that USPSA shooters won't react to visual stimulus to engage bad guys, because we are trained to react to a buzzer; and the often associated USPSA shooters will shoot innocents when ever they hear a buzzer is sad lame BS and intellectual/academic pap. All the observing shooters don't react the buzzer, ready for it or not, do they? 'Nuff said.