The 13th Doctor
So the new Doctor Who is finally going to be played by a woman. Ignore the people who are going to complain. Ignore the people who are already complaining. Don't let them make this moment about them. Don't let them win by hijacking the conversation into either arguing or justifying when it should be about excitement and wonder for what's to come. Don't let them ruin you finally getting to throw your hands up in triumph.
Remember: Doctor Who is about the triumph of intellect and romance over brute force and cynicism.
You see that's the problem we still have with the internet. As human beings, we have this tendency to default into thinking everyone thinks like we do. In our real lives the people we chose to spend time with have lots of things in common with us and, chances are, tend to share our opinions. On the internet, we're confronted constantly with people who don't think like we do and who don't share our opinions. Those people have always been there and will always be there.
And, yes, there have always been haters and complainers and contrarians. Especially when society takes a step foreword, moves closer to that world where we don't pay attention to things like class, religion, skin color, sex and it's orientation--especially when it comes to a fictional character. Doctor Who has always been a show with a fluid backstory and freely reinvented it's mythology. It makes total sense that an alien race that was able to free its consciousness from the constraits of a single body and the boundries of space and time would also unfetter itself from gender. (Never mind we have no idea what sex organs Gallifreyans actually pack.) We need to not let them distract us. Don't let the conversation be dictated by the bratty chatter from the kid's table. As adults, we keep moving forward with intellect and romance triumphing over brute force and cynicism.