Guys,
I have a sort of funny story. As I've mentioned here before, I finally just got back my Scorpion trigger pack back from CZ, so today was literally the first day I've been able to shoot it. I took it to the range where I'm a member and used the indoor pistol facility, and it had more people shooting there that day than normal.
So, I have my pistol Shockwave braced Scorpion and I'm already super self-conscious about making sure I do not "shoulder" it. I'm not sure about how your guy's ranges are, but at mine
everyone is a busy body and it is very irritating and it has nothing to do with "safety," they're just nosy (90% of the time these guys talk to you they give you information that contradicts the rules of the range).
As I'm reloading the first magazine this guy stops me and asks if I'm a new shooter. I'm a little surprised because he wasn't the first guy who stopped me that day but the other guy stopped me to say how "accurate" the Scorpion must be because I had a small group (fluke--I'm not a good shot yet). But I say to the second guy, "I am a new shooter--can you tell?" and he says, "I haven't looked at your target, but I noticed how you're shouldering that rifle... you
need to put it against your shoulder when you shoot it." And then I explain that I can't legally shoulder this pistol because it would hurt the ATF's feelings. He then says, "I bet you not a single guy at this range knows about that rule" and I say, "yes I agree, but it's better to be safe than sorry." As a side note, the first guy who mentioned the accuracy to me also wasn't aware of the brace/shouldering rule.
So in short, by NOT shouldering the Scorpion, the people around me at the range, think I don't know how to shoot a gun.

How ironic is that? This entire time I was so worried that I was going to get backlash at the range for even having a brace, and I was sort of right, but for the wrong reasons.
I have to say I'm surprised because I knew about the "brace" controversy since before I had any interest at all in a firearm that used a brace, and I have only been interested in guns since June.
The question is: What is your experience with using a braced pistol at a range? Have you gone completely unnoticed? Have you had to explain to people the ATF rule? tl;dr I was self-conscious about using a braced pistol at the range because I was afraid people would be hyper-vigilant to make sure it never touched my shoulder, and as it turned out, people were hyper-vigilant, but they were commenting to me that the brace
should be touching my shoulder because they weren't aware of the ATF brace ruling. They thought I was "shouldering" a "stock" completely wrong (I was cheeking it) and I didn't know how to shoot.