Wow... I consider myself a HUGE MCR fan, I have all the albums (duh), every magazine, every everything (I just spent $30 on Frank's photo from mychemicalromance.com just because he signed it...)
but seriously, they are real people. They have lives. It is not their responsibility to do anything other than whatever makes them happy. And I'm sure being married/having children/etc makes them happier than you obviously know.
I'm not trying to say I want the band to stop or break up, I am on the edge of my seat waiting for the new album and I will be first in line to buy it.
But they don't owe us anything at all. If they don't want to tell us what happened with Bob, they don't have to. If they want to stop making music to raise their families, they can.
I think people forget that they are just normal people like the rest of us.