I've found that SxS shoots, charity shoots and other specialty events attract people who have shot very little to no clay targets at a public range. Those of us who shoot all the time and automatically practice safe gun handling forget that what seems obvious to us is not to the casual shooter. I'm usually one of the folks who jump in when I see an obvious safety violation and have made myself unpopular with those who are unsafe. I'd rather someone is upset with me for embarrassing them in front of their friends than have to deliver first aid to a victim of a horrific accident. Or worse, get shot myself. The problems I see all the time are 1) loading a gun while walking up to the shooting stand; 2) stepping out of a stand without breaking the gun open first; 3) after a misfire immediately opening the gun to examine the cartridge - I've seen a hang fire and it's scary; 4) working on a gun/ammo problem with a live round in the chamber and waving the muzzles around; 5) walking between 5 stand stations with a loaded gun and 6) walking around a club with a closed action. I've asked numerous people (dozens) to open their actions at gun clubs and most of these folk were offended. Three times when guns were subsequently opened a live round was in the chamber and the safety off, not that the position of the safety mattered. Sometimes it's hard to enforce safety rules without making the offender look bad, but they could kill someone so we all have to be vigilant.
We could also discuss unsafe target presentations on sporting or 5 stand courses wherein you have to discuss this with the club owner/manager. This does not make you very popular, but I've done it.
Stay safe,
Jeff