Same for me, except substitute "USPSA" for "IDPA." Some of my fellow competitors don't reload, so some of the brass I pick up after matches is once fired. The rest? No idea, but as long as it's not mangled and it doesn't split when I load it, no worries. I pitch cases that are bulged/too hard to size, as well.
Yup. I try to avoid even picking those up. I've personally seen one of those separate at the ledge - got stuck in the chamber and ended the match for the person it happened to. Admittedly, it was in a 9 Major Open gun, but still, with 9mm brass being effectively free, there's just no reason to bother with that ledge stuff. (FM, IMT, and AMMOLOAD are the headstamps I've seen it in, although I've seen a few FM lately that don't have it.)Also I sort out any brass by Freedom Munitions (FM and....IMT????) which has that infernal internal step, and it goes straight into the brass recycle bucket.
I've been sorting out CBC and saving it for later for a while due to the fact that they tend not to be tolerant of the seating depth required for MG bullets to cooperate with my two Walther guns' short/tight chambers. I figure when I eventually switch bullet types, maybe I'll find one that plays nice with that brass, and then I'll have a decent quantity of a single headstamp to use for a while. I just look at the headstamp before putting any given piece of brass into the press and segregate them out at that time, though; pre-sorting seems like it would take too much time and effort.