Interesting thought though: in a world where it is normal to own weapons, to protect yourself during purge, and where it is normal for people to talk about plans for getting together in heavily armed groups to protect themselves during purge...it suddenly becomes a lot easier to coordinate in order to overthrow oppressive and evil governments.

Why do you have an arsenal of weapons? Purge. Why are you talking to people about getting together with weapons and supplies? Purge. Why are you discussing meeting places for your group? Purge.

I haven't seen much of those movies myself, but I got the impression it's even considered reasonable to discuss plans about who you're gonna kill during purge.