The realization that (1) JWs really teach that you must be a JW to survive Armageddon and (2) billions of people have never heard of JWs was a key factor in my "awakening." In fact, my first topic posted on this board related to this issue.
I've heard the "community responsibility" cop-out. As far as I know, it's still an official doctrine, but I don't think it's been mentioned in print in a long time (decades, perhaps). Only older or more studious JWs would be familiar with it today.
I've found that most modern JWs--especially those in their 20s and 30s--don't believe you must be a JW to survive Armageddon. Rather, they believe that God and Jesus will read people's hearts. That's what I used to believe. The problem is that this doctrine is not in WT publications. In fact, it contradicts established JW doctrine (for example, the "mark for survival" in Ezekiel).
When I point this out to JWs, they fall back on the "trust in Jehovah" line and say that they're just leaving it in his hands. The important thing now is to be active in the preaching work in order to avoid bloodguilt. Of course, by saying that preaching is required to avoid bloodguilt, this is a tacit admission that God will kill people who don't receive the JW message. So, either way the JWs can't win. The circular logic is making me dizzy.