I'm the kind of person who would be mad at my choices in that case. If I failed to plan for that sort of thing it's on me. "What of someone sends abuse to my text message forwarder?" isn't all that out there of a question.
I should clarify that these messages are being relayed internally to me and like two other people. It would not be possible for someone to use out software to spam people. We are not a SAAS provider. We are a local service company.