On one hand, a Zipcar can be used to go shopping,
BUYING TOILET PAPER
one roll at a time is not
HOW WE WE WERE MEANT TO LIVE
First, let me talk about the people who might need a car share. Like me, they live in the dense parts of the city. They probably don't own a car because they are a short walk to the subway. I am a short walk to the subway (3 different lines). But I have kids. I think that people with kids are just a little more likely to own a car than those without. The point is, that it is really hard for anyone to walk home from the subway without passing a store that sells toilet paper.
Then there is the argument about how important it is to support your local retailer. Basically, if they loose their toilet paper business, they might not be there when you need a quart of milk I don't want to have to use a car to buy a loaf of bread. I don't live in suburbia for a reason. (STAY AWAY WALMART).
Also, if are looking at this subway ad and don't own a car, you are likely to live in a small apartment. Do you know what we call the volume of space 20 rolls of toilet paper takes up in a Brooklyn apartment? One-Third of the only closet I have.
I might get rid of my car and give a lot of business to car sharing programs. But I'm not going to rent an SUV just to buy toilet paper.