This is pretty much it.  Nintendo has created an image of the Wii and games that don't fit that image shock some people.

For the most part, I agree.  I think the scales tip so far in the PS360 direction, with regards to investment/return, that it makes more sense to put mature games on those platforms, in general, but obviously if there's a genre opening on the Wii, or if a game can be done for much less on the Wii, then the Wii is a viable option as well.

I'm just putting forth the obvious -- demographics are the reason there are more M-rated games on the PS360 than the Wii.  There's still room for M-rated games on the Wii -- just not as much.  The thread title "...any M-rated game is wrong for the Wii" is pretty black-and-white -- the problem is much more gray, by nature.

there has been plenty of M rated games on the Wii.... Madworld just happend to get caught in the crosshairs...

@Procrastinato: Well demographicwise that would be true, but demographics are largely defined by the games on the platform and on PS360 side, the competition hurts sales. Madworld came just out, The Conduit is next one coming, Redsteel 2 should be out sometime and other the type of games that are released are making the demographic stronger, which will lead into more sales.
If we think how Sega will benefit from Wii demographics is, that if Redsteel 2 with WM+ support (it really has a lot of potential) gets people in droves running to Wii, due to lack of competition, Conduit and Madworld may be the next titles on the purchasing list for the people.
Also, since Wii audience expands beyond the people who bought the console, there's big potential to have a huge hit if you're willing to try things out. If we make an assumption that half of Wii Fit sales was to non-single women or single mothers, it means that there's potential for atleast another same sized demographic on Wii that just needs to be untapped. If women are the users, it's likely that the console is in the livingroom TV instead of kids room or a dark corner somewhere.

Not at all since we see it all the time with third-party JRPGs on the 360.  People will argue that they shouldn't be on there solely based on sales without taking into account that Microsoft may have moneyhatted for the gamesor the plan is to make them multi-platform or whatever.

I've seen the Madworld commercial 3 times now. It clearly states it's a Wii exclusive at the end too.

Anyways, the only people who think it's wrong are fanboys. If you want a game that's exclusive to a system you don't have, then you'll have to buy that system. Complaining about it won't do anything, as we've seen how well the petition to keep Devil May Cry 4 a PS3 exclusive worked. Oh wait, it didn't.