Why does STOP work here?

inerte · 2025-01-22T01:22:32 1737508952

Carriers and SMS service providers (like Twillio) obey that, no matter what service is behind.

There are stories of people replying STOP to spam, then never getting a legit SMS because the number was re-used by another service. That's because it's being blocked between the spammer and the phone.

yawgmoth · 2025-01-22T13:15:25 1737551725

STOP works thanks to the Telephone Consumer Protection Act (“TCPA”), which offers consumers spam protections and senders a framework on how to behave.

(Edit: It's relevant that STOP didn't come from the TCPA itself, but definitely has teeth due to it)

https://www.infobip.com/blog/a-guide-to-global-sms-complianc...

celestialcheese · 2025-01-22T01:21:39 1737508899

https://x.com/nikitabier/status/1867069169256308766

Again, no clue if this is true, but it seems plausible.