I only read the first half of all the posts in this thread, but I bet that I could go through this thread and pick out with 90% accuracy the people that have kids, and the ones that don't. In GENERAL, The ones that don't say anyone should have access to any game. Generally, people with kids want a more moderated environment.
I also bet that many of the people who have kids were one like the ones that don't, and once thought universal access was the desirable alternative. Life changes when you have kids, perspectives change. I am of the persuasion that there should be restrictions in place, but, more importantly, parents should play an active role in filtering media, based on the maturity level and personality of each kid. It takes work, yes, but anyone who thinks raising kids is easy or takes no work probably isn't a very attentive parent, and it will be a miracle if their kids wind up well-adjusted.