Is Chad a necessary evil?
Okay, let's start with that disclaimer about DVD bonus commentary. Not necessarily my views but I think there can be an intriguing argument made for Chad playing a necessary role in the world.
I have a hard time considering anybody in this movie innocent. There are differing levels of maliciousness but what we really have are 2 misogynists and a player. Chad is evil in his intentions and in his actions, true. But he also serves as the punisher for the misdeeds of both Howard and Christina. Christina is not exactly innocent here and more or less illustrates perfectly the reasons that the men describe they hold for disliking women. Think about it. If she had just been decent and dated one man at a time, their entire plan would be foiled. If they had legitimately found a woman who didn't fit their stereotype they wouldn't have been able to continue. But she wanted to have her cake and eat it too. And as for Howard, he may have been a lesser evil than Chad, but he still went along with this terrible plan. It may have been a bit over the top, but really I think both Howard and Christina got what they had coming to them.