Obviously one could do actual research and try to get a more solid answer, but, hey, this is a blog, so I'll just say that I highly doubt that car sharing programs are "bad" from any perspective. Yes, I probably drive more often than I did when I didn't have a car and wasn't a carshare member, but on the other hand I drive a lot less than I would if I actually owned a car. If not for carsharing, I probably would have been car free for a few years and then I would've purchased a car. They're useful things to have, even in the urban hellhole, and I never liked relying on friends for the occasional car need.
Even if total driving miles stayed exactly the same in a car share versus non car share world, there's great social value in having fewer cars on crowded streets. More parking spots for the rest of you!
And more than that, by reducing the number of necessary cars per household, car sharing reduces overall urban living costs, making it more affordable. Relative to most suburban living, urban hellhole dwellers have a lot more non-car options, whether or not they have a carshare membership.
