I agree, with most of what you said.. Minecraft is not only a game for some, it's a whole fantasy world where they can escape the troubles of life. I'm not saying I approve of this behavior, but what people want to do in games, is their choice. Minecraft is a world where anything is possible.
Edit: from what I have also seen in my days on Minecraft, and on my server, girls don't consider this stupid...they consider it a way to get what they want. Some girl tried to hook up with my friend on my server for admin.....