RumikoOhara said
most of half of those who've posted characters won't post or will post at best only twice
So wouldn't the GM just kill them off after they don't post anything for a while and don't have an excuse for being away. Or instead we could have their characters venture off and if they ever come back just say like "Oh, hey! What are the odds that we would run into each other again!" and just have them go from there? I don't know, just trying to think of possible solutions.
And yes, good point RumikoOhara, Ryan does not beat the entire group thanks to Karen, sorry.
Also, good point Anvil. Glen is a great example. However I don't think having 3 kids in a group of 15 is too much of a problem as long as they don't act like Carl. Plus, kids can crawl into smaller spaces that the other characters can't and as far as dealing with other survivors, having kids with us would make us at least seem more innocent. They're not completely useless, its just that there's definitely potential to be useless.