I do this....
piece of mind nobody will hit my car, and a littler excercise never hurt anyone from walking to the store form the BFE.
except one time. had my old honda accord- not bad for a 94. some dickheads in (Im assuming) soccer mommys new durango pull in next to me, sideswipe the drivers door and rip off the moulding. They point, laugh, and leave to a different store(once again, Dumbasses. I was 16 and still had more respect). I watched the whole thing from my stores window. I wont go into details, but new car doors arent as strong as they used to be.
nowadays I park in the corner, passenger/passenger with my buddies Z28. cram to the side, theres a good 3 deet to the enxt spot