tl;dr: there are no spam filters at (some?) SMS providers, and (apparently) no incentives and no mechanisms for SMS providers to filter unwanted traffic. For s

tl;dr: there are no spam filters at (some?) SMS providers, and (apparently) no incentives and no mechanisms for SMS providers to filter unwanted traffic. For spamming or harassment or whatever the sender might want, based on the OP. The poster will want to chat with the regulatory entities that have oversight of the SMS provider and over consumers. Given the reference to the (US?) DNC, that discussion would involve the US FCC, as well as the state-level commissions.