alt Hacker News> The STOP keyword is mandated as unsubscribe at the carrier level (Verizon, ATT, TMo) not just the vendor level. So if you reply STOP, it's very likely that you will not receive another message from that number.
Is that just for programmatic messages, or all messages?
I could see problems if it was all messages. For instance suppose a relative coming to visit for weekend and due to arrive around 5 pm Friday. You get a text from them that afternoon saying that there was an accident that has blocked traffic and police say it will be several hours before the road reopens.
They ask if you would prefer that they continue as soon as the road reopens, which will probably mean they will arrive around 1 am Saturday, or stop and spend the night with another relative who lives near where they are currently stuck, and then come Saturday morning which will get them to your place around 9 am.
You text back "stop" to indicate the latter option, and now texts from that relative are blocked. Oops.
Replies
It’s just programmatic vendors. The problem as someone else in the thread pointed out is that shadier carriers won’t honor it or only pay lip service to it. And people that are doing spam campaigns will be forging numbers and rotating numbers constantly so actually blocking the numbers does very little.
It only applies to programmatic and automated messages
When a company or service sends text messages using an automated system like SMS marketing software or bulk messaging service), these platforms are by design and mandatorily programmed to recognize keywords like "STOP" as a signal to unsubscribe the recipient from future messages. This is a requirement for all such systems under Telephone Consumer Protection Act (TCPA).
Text messages to your friends do not go through such platforms and so are not subject to that law.