Not that that is even a real issue or agenda, I would have to say leave things as they are. We aren't even teaching our children to read, let alone mature fast enough to understand politics. Hell, most adults don't understand politics, they just repeat what their favorite news channel, political and religious leaders say. I really don't see any sinister plot to legitimize or legalize pedophilia, but I can certainly see 16 year olds being more liberal than conservative.
I also think we should stick to the original saying: "If their old enough to go to war, they're old enough to vote."