Besides, the DS is a new system. In my mind it's better to have people think poorly about the DS then to not have them think about it at all. It's better that they know it exists, because then there's a chance they'll buy one. Since the DS is also targetting non-gamers to the max, they won't care if a commercial is tiku! or not, but now they know that it's out there. Especially since the PSP is the DS's competition; a casual gamer is less likely to buy a PSP because of it's price (the fact that it does so many things may actually deter people who become confused easily).
Now, obviously a positive buzz is better than a negative one, but it's still a buzz. These commercials make some people laugh, and others scowl, but either way if they tell their friends they're getting the word out. Personally, I love the "big-suit" commercials, so I'm spreading a positive buzz. You're right about people being weak and insulting people for buying Nintendo stuff, but I don't think that it's really a problem with the DS, it was mainly the GC. I mean, even the pathetic people who did that stuff owned a GBA.
Also, we are very off topic. This game rocks, buy it, you'll love it.