Ok let's toss together a makeshift timeline shall we?
Step 1 - Games are for children! There's no need for a mature game rating.
Step 2 - The people asking for a mature rating are a vocal minority
Step 3 - The people ask for a mature rating are a dangerous, violent, vocal minority
Step 4 - Fine, fine, just to show you how much of a minority they are, we'll hold a vote.
Step 5 - Holy crap, 86% of over 50,000 people want this mature rating thing. Well, um.. I guess maybe we should...
Step 6 - No wait! Over 40,000 people can STILL be the minority! Jeff in accounting just did the math! Let's postpone making 40,000 citizens happy and find enough people to justify our original comments! After all, I'd rather be right than re-elected!