i get plenty of sms though. very annoying to get it to stop. you can reply STOP or whatever they suggest to reply to stop the messages but it doesn't seem to do anything.
As with replying "unsubscribe" to spam messages, replying with "stop" to spam texts may just notify the senders that your email account is still active and being read by a human. If it's not from a legit organization which will actually respect your "stop/unsubscribe," just delete the message and don't reply at all.