Well i think some people think about their cars in the wrong sense. If they think that putting a larger size rims will ruin their car's suspenion. Well in that case they should never take it out of their home. Coz if u drive it on the roads of karachi, u r going to ruin it anyways.
I have seen people driving a 2003 model corolla which still had plastic covers on the seat.
Even in my case when i bought this car, it had seat covers but the moment i sat in the car. I took it directly to haroon radio to have a sound system installed. And while the installation was going on, mad_racer and myself. We ripped the seat covers off. Coz i drive wat i feel looks good and feels good.
So the three questions that u asked, none of them has an answer. It all depends on the person himself.