People Don't Want SMS Spam
This one seems really obvious here, but there have been a number of studies (all commissioned by marketers, of course) saying that people actually liked SMS spam, so here’s one that says the opposite. Only a very small percentage said they wouldn’t mind commercial SMS text messages. About 13% said they had no problem with it (ask them again, after they’ve been bombarded) and another 6% said it would be okay if the text spams were relevant.