Ah the hapless red shirts. They float through life like targets. We have the brave but brainless extras-cum-ensigns from the original Star Trek to thank for this name. In nearly every horror movie there’s some hapless nitwit who isn’t paying attention, the monster stalks up behind them and the screams begin. You can always spot a red shirt, even when they aren’t in red. They are usually played by actors you don’t recognize or characters you don’t care anything about.
If you’ve got a red shirt in your survival group it’s time to get them to change their colors. Sloppy survival skills pose a risk to the red shirt and everyone around them, which means you. So get your people training as soon as possible. Get them practicing weapons use and survival skills. Run drills if you have to and make sure everyone does it. A red shirt who feels they are being singled out can turn into a minor villain pretty quickly if they feel they are being unfairly singled out.