1 ) Grab Shotgun.
2 ) Go Outside.
3 ) Think "Time to fight people like a BR, if I die that's GG".
4 ) Get killed by psychopathic sniper 200m away.
Many such cases.
Also, I'm pretty sure because the hospitals are closed/fucked-up after the night and for a few weeks (inevitably getting raided by armed druggies, overwhelmed, etc). if you're seriously wounded, such as a gunshot, you're just screwed. Would this count as a CTB method then?
I mean, I can imagine many people going out in masks and stuff thinking of fulfilling their murder fantasies (or rioting), only to get killed by snipers, shooters, etc. Just staying home you're already much safer without fortifications or weapons because all the purgers would be busy fighting each other.
I mean, what little of the movies I saw, it really acts like the purgers are almost like a somewhat united faction that attacks innocents (though it makes sense considering what it ACTUALLY is in, at least the first movie). Thinking about it, at first it'd sound like a war zone with riots, shooting, fighting, etc, and then relatively quickly, get real quiet, because all the purgers are dead.