In our overly litigious and regulated society local municipalities place all kind of requirements on any business. Width and length of parking spaces, how many handicapped spaces etc. They even have requirements for turn radius at the end of parking rows. Thus the end spots usually marked with yellow lines. Now if someone cuts the corner too sharp and hits your bike you can not hold the store or the driver liable, plus your insurance company might now have a reason to hassle your about paying for damages. If you are at one of those mega stores think about little blue hair granny taking the turn too close. It can ruin your day. And don't forget the cell phone user looking for a close spot and not seeing your ride. I usually try to park a distance away, besides the walk is good for me.