After this happened to me, I managed to get Sprint to lock my account from having any SMS subscriptions added, since I'm not in the habit of signing up for them on purpose. It took some persistence and a transfer to a manager, but they eventually agreed. Might be worth trying.
I do think the mobile phone companies are at the very least turning a blind eye to it; some very basic vetting, like making sure the company has an actual address at which they can receive postal mail that doesn't bounce, or terminating services that generate too large a percentage of fraud complaints, could catch a large portion of the worst offenders.
I do think the mobile phone companies are at the very least turning a blind eye to it; some very basic vetting, like making sure the company has an actual address at which they can receive postal mail that doesn't bounce, or terminating services that generate too large a percentage of fraud complaints, could catch a large portion of the worst offenders.