As luck would have it, the number we were assigned for SMS seems to get some spam messages and there is no way to block numbers. Since SMS is a premium feature that we pay extra for it would be nice to see some extra features included like caller ID blocking. Don't get me wrong, I am considering extending my cars warranty, but I'd prefer not to have those messages in OR.
We get 2-3 spam calls per day on our SMS number. I have the number labeled "OwnerRez Guest" so I know to always answer when it rings, but unfortunately 9/10 times it's just a spam call.