I was referring to vendors of commercial 10DLC and short code messages, not consumer-facing mobile providers. Consumer-facing mobile providers (where doxxing is a risk) could reply with just the carrier’s abuse contact (ie, abuse@ and/or a phone number). And even if it was only implemented for 10DLC, not consumer-facing mobile, that would be a start.
This would be used for doxxing people. Anyone you text can get all the information they need to swat you.