Consent is recorded
Marketing texts require opt-in, and the opt-in is stored on the lead record with a timestamp and its source. Turning it on by hand requires a reason, which is written to an audit log.
Numbers are screened
Numbers appended by a lookup are checked against the National Do Not Call Registry and for known litigator history before they are saved. A registered number is labelled as such, and texting stays blocked on it.
Opting out
Standard reply keywords stop messages immediately and permanently, without an agent having to action anything.