Yea you really want to have deepdish fronts and have skinny rears with a fwd car. Now that would be kinda cool looking for your ms3 have some 265s in front with stock 215s in the rear and people wouldn't think you are stupid for having large rears on a fwd.
heres my friend ms3 with staggered wheels http://www.mazdas247.com/forum/showthread.php?t=123673787
Other than the fact it is not practical, I see most of your arguments out the window. The recurring 'retarded' explanation carries no weight.
There's plenty of cars with differing body lines where it looks and fits normally.
Sure there is an increased cost due to tire wear, and hindrence on racing performance but I still see no reason why it can't be done for looks!
Nothing more than personal opinion!
What if you were to go with a wheel like AXIS? They make wheels for FWD cars to run Staggered. It gives the illusion of staggered wheels on a FWD car but really is the same all the way around. Rotation wise I would just leave the back ones on and burn through the front ones. You'll go through 2 front sets before you have to change the back ones. http://www.axiswheels.com I was actually looking at the Widetrack 18x8s....
My M3 had staggered wheels (that was a BMW, btw) from the factory, and honestly, I wanted to go WIDER in the front so that they matched all the way around. I just cannot understand the idea that staggered wheels on a front-drive car "looks good." It doesn't. I give up.
I'm pretty sure that was BMW's "way" of building in more understeer in the M3.