Come to Target. We Will Drive You Home.

The first Target store in San Francisco is set to open downtown in the Metreon building in 2013. Here’s an idea I’ve been thinking about that seems to me like a great idea. I hope Target implements it, and if not, I’d love to understand the shortcomings of the idea.
Problem
I imagine that a big challenge of shopping at the San Francisco Target will be transporting your stuff home. People will have a few options: Those with cars (either owned or shared) can drive, fight traffic, pay for parking across the street, and cart their stuff from Target to their car. Those without cars can buy only as much stuff as they can comfortably carry back on the bus; or pay for a cab (which may or may not be easy to find).
Solution
What if Target put forth some version of: “Spend $100 at Target and we will give you 50% off a ride home. Spend $200 and we will drive you home for free, anywhere in San Francisco.”
It seems to me that this would encourage folks to spend enough to get a discounted or free ride home, and my guess is that the economics could be made to work without a ton of difficulty.
It Gets Better
But perhaps the best part is this: Target could drive people home in branded vans that read “Come to Target. We Will Drive You Home.” These vans will drive around the city and would be a fantastic marketing campaign.
Of course, the same idea could work for any store in a dense urban environment that wants to encourage customers to buy a lot of bulky items.
Someone please tell me why this isn’t a great idea!

