I'm neurotic
. I'm rather obsessed about collecting all my brass. But at least I know this. And knowing this, I do a few things: First, I try to pick a lane that's isolated - or at least not near somebody shooting the same caliber. Second, I go to the range when it's not busy. And last, I shoot revolvers a lot 
. It's rare when I go to the range with a semi-auto during busy times. But when I do shoot semi-auto, my fixation on collecting all my brass does have the unintended benefit of pacing my shooting. It gives me time to pause and collect my brass - and thoughts. I usually do a mini clean up after every 2 or 3 mags.
BTW, my range is public. But there's also a membership option. Members have bench priority during busy times (which is something I have never exercised). My range gets really busy on the weekends with non-regulars. You see a lot of city-slickers with their girlfriends out there on Sat/Sun. I usually leave the range to them and spend time at home with my family. Although, sometimes I go out there on the weekends (with a revolver) - just to show 'em how it's done
Hey, everyone needs an ego-stroke now-n-then, right? heh Smugness aside, I have met lots of nice people willing to learn - who I gladly help - on the weekends. It's a different crowd; but it's been my experience over the last 3+ decades that most shooters - even just the occasional ones - tend to be very nice people. Back to the brass thing: Our RSO's do clean up brass from time to time. Again, most shooters are pretty good about housekeeping, and so it's rarely an issue. I just came back from the range about an hour ago. I was shooting revolver (44 Spl/Mag). One guy left and didn't bring his target frame back - I grabbed it during a cease fire. Had I not done it, the RSO would have. Another guy left a couple stalls down from me, and his housekeeping left some to be desired. I did the sweep up (only about a dozen rounds of 9mm) and placed them in the brass bucket. Oddly, he kept the brass he did sweep; but saw fit to do a sloppy clean up job. ?? Must not be neurotic
One time, I was shooting 45 ACP and a regular a few lanes down was shooting the same. He told me I could have his brass if I want to sweep it up (I don't know why he doesn't reload; but he doesn't - he likely has more money than time). I gladly agreed. As I was sweeping, I noticed they were SPP's
I didn't say anything. I agreed to sweep-n-keep, so I followed through - with a smile (to address a side conversation here: I process SPP 45 ACP brass for reloading, but have never loaded any.) But yes, if someone gives you their brass that's still on the ground, that's cool.
